1950, 1938, 1939, 1942 (must have an S or P), 1943, 1944, 1945 and any nice and obviously V nickels, buffalo nickels etc..I usually keep pre 1960 and like to keep all uncirculated shiny coins that shouldn't be that nice for its age..On a side note, I keep all foreign coins because they are just cool! GOOD LUCK!