ECU Silver Mining Inc.
TSX VENTURE : ECU

ECU Silver Mining Inc.

May 27, 2005 11:51 ET

ECU Silver Mining Inc.: Press Release-Operating Results

TORREON, COAHUILA--(CCNMatthews - May 27, 2005) - ECU Silver Mining inc. (TSX VENTURE:ECU) -

ECU Silver Mining Inc. (the Company) is pleased to report sales of approximately US$119,000 in the second seven days of operations at the Velardena property. The mill processed 1,567 tonnes between May 11th and May 19th. For two days during this period, the mill was on standby for upgrades to the Zinc circuit. It resulted in a production of 72 tonnes of lead concentrate (concentration ratio of 21.8:1) and 89 tonnes of zinc concentrate (concentration ratio of 17.7:1). This means a significant improvement in revenues per tonne processed to US$76/tonne from US$56/tonne previously.



The average grades for that period were:

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ASSAYS FOR THE WEEK OF MAY 11TH TO MAY 19th
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Au g/t Ag g/t Pb % Zn %
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Feed 6.12 270 1.94 3.71
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Pb Concentrate 7.59 5,735 40
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Zn Concentrate 573 54
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Tailings 5.91 54 0.55 1.49
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Considering the concentrates produced and the above assays, the recoveries of payable metals were approximately 92% of the silver, 86% of the lead and 76% of the zinc. Those are a net improvement on what we had in the first week and the relatively high quantity of zinc in the tailings led to the decision to do additional modifications to boost flotation capacity of the zinc circuit. The modifications were done between May 19th and May 22nd.

All samples used to calculate the above averages were assayed at Ersa Global, Ensayes y Representaciones S.A. de C.V. in Torreon, Coahuila state, Mexico. Concentrate samples were taken from the operation as well as from each shipment with portions kept for reference and referee assaying should it be needed.

This work was carried out under the supervision of Mr. Michel Roy, P. Geo., a "qualified person" within the meaning of NI 43-101, who also prepared the technical information for disclosure in this news release.



Head Office
Rouyn-Noranda
Quebec, Canada
J9X 7C8
Tel : (819) 797-1210
Fax : (819) 797-1214


Corporate Office
J. I. Jimenez 663
colonia Los Angeles
Torreon, Coahuila,
Mexico, 27000
Tel: (01152)-871-717-8633
Fax: (01152)-871-718-5025



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