Source:
Some 25 cents 1967 coins were produced with 80% silver in it, while others with only 50%.
Specifications
Alloy:
1) 80% silver, 20% copper,
2) 50% silver, 50% copper
Weight: 5.83 grams
Diameter : 23.88 mm
Engraver: Obverse: Arnold Machin, Walter Ott, Reverse: Alex colville, Myron...