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Endeavour Silver Reports Positive Drill Results for the Parral Project

Drill Results Resource Estimates Exploration Programs

(All amounts are in US dollars, unless otherwise stated)

VANCOUVER, British Columbia, Dec. 16, 2021 (GLOBE NEWSWIRE) -- Endeavour Silver Corp. (TSX: EDR, NYSE: EXK) is pleased to report positive drill results from its ongoing exploration program at the 3,432-hectare Parral project situated in the State of Chihuahua, Mexico.

During the last 11 months, until the end of November, the Company has drilled over 14,000 metres in 59 holes targeting several areas along the La Colorada vein.

Highlights from Recent Drill Results

  • 2,846 gpt Ag, 0.65% Cu over a 0.89 m ETW, including 3,380 gpt Ag, 0.77% Cu over 0.75 m (VCS-10)
  • 840 gpt Ag, 0.11 gpt Au, 0.25% Cu, 9.09% Pb and 4.74% Zn for 1,288 gpt AgEq over a 2.77 m ETW, including 1,585 gpt Ag, 0.26 gpt Au, 0.55% Cu, 34.88% Pb and 4.38% Zn for 2,755 gpt AgEq over 0.36 m (VCU-38)
  • 708 gpt Ag, 0.55 gpt Au, 0.16% Cu, 10.95% Pb and 12.38% Zn for 1,504 gpt AgEq over a 1.23 m ETW, including 1,130 gpt Ag, 0.91 gpt Au, 18.95% Pb and 18.70% Zn for 2,406 gpt AgEq over 0.69 m (VCU-50)

Abbreviations include: gpt: grams per tonne; Au: gold; Ag: silver; Cu: copper; Pb: lead; Zn: zinc; ETW: estimated true width; m: metre; HW: hanging wall. Silver equivalents are calculated at a ratio of 80:1 silver:gold, silver price of $23 per troy ounce, copper price of $3.45 per pound, lead price of $0.90 per pound and zinc price of $1.20 per pound.

“The Parral project continues to deliver great results,” commented Dan Dickson, Chief Executive Officer. “Following limited drilling in 2020 due to the pandemic, it was a priority for our exploration team to re-start the exploration program at Parral this year to expand on the mineral resource estimate we published on the project in early 2020. Our goal is to continue the drill program at Parral in 2022 as we get closer to achieving the scale required to support a positive economic assessment.”

The Parral project, which was acquired by Endeavour Silver in 2016, is in Hidalgo de Parral, a large historic silver mining district adjacent to the city of Parral, in the State of Chihuahua, Mexico. The project district comprises classic, high-grade silver, epithermal vein deposits, characterized by low-sulphidation mineralization. The property is accessible by paved and gravel roads and has access to the local power grid.

The Veta Colorada (including the Sierra Plata and El Verde mines) was a past producing mining operation owned by Grupo Mexico that closed in 1991 due to low silver prices. Mineralization, which occurs in a major silver vein structure that ranges from 1 to 30 metres thick, was mined seven levels down to 300-metre depths below surface in places and was traced for seven kilometres.

The Company filed a NI 43-101 technical report on the Parral project, State of Chihuahua, Mexico on March 14, 2020. As of December 31, 2019, Parral had estimated indicated mineral resources of 613,000 tonnes, containing 4.0 million ounces of silver grading 207 g/t, 6,800 ounces of gold grading 0.35 g/t, 17.5 million pounds of lead grading 0.63%, and 16.5 million pounds of zinc grading 0.61%. Inferred mineral resources are estimated to total 4.04 million tonnes containing 35.0 million ounces of silver grading 269 g/t, 62,800 ounces of gold grading 0.48 g/t, 65.0 million pounds of lead grading 0.35%, and 64.3 million pounds of zinc grading 0.35%.

Due to the COVID-19 pandemic, the Company suspended the Parral drill programs in early 2020 and resumed drilling in 2021.

The Parral drill results are summarized in the following tables:

Parral - Veta Colorada Sierra Plata Shallow

HoleStructureFrom (m)True Width (m)Au (gpt)Ag (gpt)Cu (%)Pb (%)Zn (%)AgEq (gpt)
VCS-07Veta Colorada Including264.252.190.012320.010.080.15241
265.800.72<0.0052880.020.080.08296
VCS-10Veta Colorada Including219.350.890.012,8460.650.000.012,914
219.500.750.013,3800.770.000.013,461
VCS-12Veta Colorada Including196.751.200.013400.040.320.60374
196.750.860.013840.040.360.65422

Note: Drill holes VCS-8, VCS-9, VCS-11, VCS 13, VCS-29, VCS-30, VCS-31 and VCS-32 returned no significant results Parral - Veta Colorada San Joaquin (view Veta Colorada (San Joaquin) longitudinal sections)

HoleStructureFrom (m)True Width (m)Au (gpt)Ag (gpt)Cu (%)Pb (%)Zn (%)AgEq (gpt)
VCS-18Veta Colorada Including164.101.892.27920.023.351.90434
164.100.705.791930.010.050.14663
VCS-19Veta Colorada Including173.651.301.054700.184.519.951,050
174.200.811.517440.245.729.151,370
VCS-20Veta Colorada Including230.852.760.98590.142.722.75322
231.850.623.83910.276.901.81675
VCS-21Veta Colorada Including186.001.470.28280.222.871.71211
187.400.330.75910.8410.353.06624
VCS-24Veta Colorada Including254.203.951.38410.192.202.83332
257.250.681.691160.227.054.82635
VCS-25Veta Colorada Including262.851.600.22500.143.026.53396
263.450.310.271050.236.3417.30939
VCS-26Veta Colorada Including313.151.110.14150.022.072.19163
313.650.370.22380.055.635.22399
VCS-27Veta Colorada Including325.651.401.43540.201.784.87411
326.200.592.12430.201.865.69486
VCS-28Veta Colorada Including244.504.240.27290.093.083.47266
244.500.390.18970.247.125.42521

Note: Drill holes VCS-15, VCS-16, VCS-17, VCS-22 and VCS-23 returned no significant results

Parral - Veta Colorada Sierra Plata Deep (view Veta Colorada (Sierra Plata) longitudinal sections)

HoleStructureFrom (m)True Width (m)Au (gpt)Ag (gpt)Cu (%)Pb (%)Zn (%)AgEq (gpt)
VCU-21Veta Colorada Including66.501.410.031980.030.600.76247
67.200.730.042880.050.891.39370
VCU-22Veta Colorada Including88.500.930.012470.050.530.97302
88.950.460.024360.090.821.66528
VCU-24Veta Colorada Including85.152.000.012630.020.560.25290
85.550.390.013400.020.150.22355
VCU-25Veta Colorada Including103.801.130.021760.020.220.24193
105.000.380.032200.020.190.35241
VCU-26Veta Colorada107.300.930.021690.010.180.10180
VCU-27Hw Veta Colorada Including146.151.120.011640.000.060.20173
146.150.33<0.0051890.000.050.15196
VCU-28Veta Colorada Including95.600.880.011960.010.220.24213
96.100.220.022570.010.350.30280
VCU-30Veta Colorada Including172.001.810.062630.030.612.02360
176.100.260.324250.120.2410.20834
VCU-31Veta Colorada Including160.501.130.062240.020.270.27248
161.450.300.053650.040.270.46397
VCU-32Veta Colorada Including156.201.080.022470.030.190.32269
156.800.520.022940.040.220.27315
VCU-33Veta Colorada206.300.730.031660.020.390.16186
VCU-35Veta Colorada Including196.001.470.032660.151.652.82429
196.700.440.033810.221.082.63529
VCU-47Veta Colorada Including111.801.760.021580.031.330.70224
111.800.560.022840.083.861.84464
VCU-48Veta Colorada Including161.355.770.044170.041.410.46478
163.650.270.134,1700.3216.551.244,702
VCU-49Veta Colorada Including178.652.480.137610.150.175.37984
179.750.250.101,1150.290.006.941,401
VCU-50Veta Colorada Including100.301.230.557080.1610.9512.381,504
100.300.690.911,1300.2518.9518.702,406

Veta Colorada 85.20 1.17 0.01 178 0.01 0.24 0.11 190

85.200.540.012230.010.310.12237
VCU-55Hw Veta Colorada Including Veta Colorada Including83.451.20.021640.060.471.04221
83.450.30.012900.130.800.68350
96.501.20.03840.020.661.25151
97.000.30.041460.031.292.48275
VCU-57Veta Colorada Including170.901.00.021390.031.521.46237
172.500.30.032120.041.763.30384

Note: Drill holes VCU-23, VCU-29, VCU-34, VCU-44, VCU-45, VCU-46, VCU-51, VCU-52, VCU-54 and VCU-56 returned no significant results

Parral - Veta Colorada El Verde (view Veta Colorada (El Verde) longitudinal sections)

HoleStructureFrom (m)True Width (m)Au (gpt)Ag (gpt)Cu (%)Pb (%)Zn (%)AgEq (gpt)
VCU-36Hw Veta Colorada Including Veta Colorada Including100.752.300.091820.083.172.84384
102.550.560.132240.094.042.15428
106.903.641.522530.113.872.39575
111.450.260.889530.381.961.641,173
VCU-37Hw Veta Colorada Including Veta Colorada Including128.703.310.201980.062.542.57381
131.350.420.523190.0710.358.52950
135.651.610.202010.020.992.58339
136.750.420.313460.051.476.69654
VCU-38Hw Veta Colorada Including Veta Colorada Including238.151.750.052040.070.781.17278
240.000.330.085410.200.812.16667
245.252.770.118400.259.094.741,288
247.000.360.261,5850.5534.884.382,755
VCU-40Veta Colorada Including236.553.700.253210.144.934.46648
238.800.460.201,0300.447.037.431,546
VCU-41Veta Colorada Including198.606.380.083250.280.782.42467
205.500.440.137020.400.662.98878
VCU-43Hw Veta Colorada Including Veta Colorada Including163.651.600.162400.050.260.48281
163.650.520.023800.020.090.15391
166.502.360.052510.030.280.48284
168.500.540.076060.030.450.43643

Notes:

1. Drill holes VCU-39 and VCU-42 returned no significant results

2. Silver equivalents are calculated using the formula:

[Au (gpt) X 80] + Ag (gpt) + [Cu (%) X 2204.6 X Cu Price / Ag Price X 31.1] + [Pb (%) X 2204.6 X Pb Price / Ag Price X 31.1] + [Zn (%) X 2204.6 X Zn Price / Ag Price X 31.1]

3. Price assumptions used are: Cu $3.45, Pb $0.90, Zn $1.20 and Ag $23.00

4. All widths are estimated true widths

5. No capping has been applied but high-grade intervals have been highlighted

Qualified Person and QA/QC - Dale Mah, P.Geo., Vice President Corporate Development of Endeavour Silver, is the Qualified Person who reviewed and approved the technical information contained in this news release. A quality control sampling program of reference standards, blanks and duplicates has been instituted to monitor the integrity of all assay results. All samples are split at the local field office and shipped to SGS Labs, where they are dried, crushed, split and 250 gram pulp samples are prepared for analysis. Gold is determined by fire assay with an atomic absorption finish and silver by aqua regia digestion with ICP finish, over-limits by fire assay and gravimetric finish.

About Endeavour Silver – Endeavour Silver is a mid-tier precious metals mining company that operates two high-grade, underground, silver-gold mines in Mexico. Endeavour is currently advancing the Terronera mine project towards a development decision, pending financing and final permits and exploring its portfolio of exploration and development projects in Mexico, Chile and the United States to facilitate its goal to become a premier senior silver producer. The Company’s philosophy of corporate social integrity creates value for all stakeholders.

SOURCE Endeavour Silver Corp.

Contact Information

Trish Moran Interim Head of Investor Relations Tel: (416) 564-4290 Email: [email protected] Website: www.edrsilver.com

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Cautionary Note Regarding Forward-Looking Statements

This news release contains “forward-looking statements” within the meaning of the United States private securities litigation reform act of 1995 and “forward-looking information” within the meaning of applicable Canadian securities legislation. Such forward-looking statements and information herein include but are not limited to statements regarding future prospects of the Company’s mines and projects. The Company does not intend to and does not assume any obligation to update such forward- looking statements or information, other than as required by applicable law.

Forward-looking statements or information involve known and unknown risks, uncertainties and other factors that may cause the actual results, level of activity, production levels, performance or achievements to be materially different from those expressed or implied by such statements. Such factors include but are not limited to the ultimate impact of the COVID 19 pandemic on operations and results, changes in production and costs guidance, national and local governments, legislation, taxation, controls, regulations and political or economic developments in Canada and Mexico; financial risks due to precious metals prices, operating or technical difficulties in mineral exploration, development and mining activities; risks and hazards of mineral exploration, development and mining; the speculative nature of mineral exploration and development and risks in obtaining necessary licenses and permits,

Forward-looking statements are based on assumptions management believes to be reasonable, including but not limited to: the continued exploration and mining operations, no material adverse change in the market price of commodities, mining operations will operate and the mining products will be completed in accordance with management’s expectations and achieve their stated production outcomes, and such other assumptions and factors as set out herein. Although the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in forward- looking statements or information, there may be other factors that cause results to be materially different from those anticipated, described, estimated, assessed or intended. There can be no assurance that any forward-looking statements or information will prove to be accurate as actual results and future events could differ materially from those anticipated in such statements or information. Accordingly, readers should not place undue reliance on forward-looking statements or information.