Thanks, I believe you're correct, mine are replacement keys. I ordered NOS key blanks and went through a nightmare getting them cut. I assumed copying keys was part of a locksmith's expertise. Little did I know! Called over 10 locksmiths no one can do it! Went to HD and Lowe's, no go, they only do it if you use their blanks. Had one locksmith quote me $20, went to local swap meet and had 2 keys copied for $4. Ugh!