You have what appears to be a Canadian 25 cent piece with the images of the Queen on one side and a caribou on the other. The series ran from 1968 through 1978. The coin was of 5.8 grams; .500 oz ASW silver; 23.8 mm in diameter and heavily minted. (10M to 176M; 1970 being the rarest.) Your coin, with the word "silver" may be a commemorative since that word does not appear on the original series. The original showed the denomination, '35 cents', in that same area.
Don....