I know these Mackerel dimes have 2 versions 80/20 (.06) and 50/50 (.0375) related to silver content. The weight is supposed to be 2.33 grams, less over time when circulated. I have 90 of them ranging in weight from 2.11 to 2.43 and are not magnetic. They were collected by in-laws deceased 25 years ago. Does anyone have information on these varied weights/silver content or advice to further research values. I've watched videos etc. Thank you for any information.
eBay is helpful in researching values. Completed listings will give you an idea of sales prices and Active listings will give you an idea of supply. Debora
During 1967, the rising price of silver forced a reduction in the silver content to use to make the 10-cent coins from 80% to 50%. The two varieties are not distinguishable by eye. ------- Higher silver content will produce a sharper higher pitch sound when dropped . (Cited from: https://www.cointalk.com/threads/how-do-you-determine-silver-content-of-a-1967-canadian-dime.201441/) It's a quandary ..
