Just got back from the pawn shop, sorta. Anyway, the 2 1/2 inch .38 Diamondback is nickel plated I beleive, but the .22 I was told is stainless. I am half tempted to beleive him, the finish is not the same as the other Colt. Is there anyway to check the serial# to find out or maybe another test? Serial# on the .22 4 inch is D944xx Thanks for any help.