This dime is a lil thicker than all my other Canadian 1980 dimes as well as a lil darker I don't known of its a wrong planchet or just a change in that year
Can't really make out anything on the photo, but no specification changes to the dime in 1980: 1979 - 1999 Composition: 99.9% nickel Weight (g): 2.07 Diameter (mm): 18.03 Thickness (mm): 1.22 http://www.mint.ca/store/mint/learn/10-cents-5300008#10_1