[Translation] Ref. PDI/BK-02-011/2005 28 February 2005 To : President The Stock Exchange of Thailand Re: Clarification on the companys performance results in 2004 Enclosed are the copies of PDIs audited financial statements and consolidated financial statements for the year ended 31 December 2004 in both Thai and English version. From the companys statement of income on Equity Method, the companys revenues from sales was Bt5,663.7m which increased from year 2003 by Bt835.8m or a 17.3% increase. There was a net profit of Bt221.6m or an earning per share of 0.98 Baht as compared to a net loss of Bt2.8 or a net loss per share of 0.01 Baht in year 2003. From the companys consolidated statement of income, total revenues from sales was Bt5,673.8m which increased from the year 2003 by Bt838.0m or a 17.3% increase. There was a net profit of Bt217.0m or a net earning per share of 0.96 Baht as compared to a net loss of Bt2,841 or a net loss per share of 0.000013 Baht in year 2003. 2004 was a rebound year for the company with an operational result rallying substantially over the previous year primarily due to: the stronger zinc price which grew over the period to an average of 1,048 USD per metric ton, the higher demand for zinc metal on the local market, sales of added-value products in accordance with the global strategy and last but not least the completion of the new flotation plant at Mae Sot mine which allows the company to economically mine lower grade ores and thereby to reduce the dependency on imported concentrates. This result was achieved despite several unfavourable factors which include the low treatment charges for imported concentrates, soaring freight, high electricity price as well as the reduction of import duties. Please be informed accordingly. Yours truly, - Signature - (Mr. Surin Tanticharoenkiat) Board Secretary Board Secretary Division Tel. 0 2661 9900 Ext. 1402, 1501 Fax. 0 2661 9946