These are the ignition keys for my '48 Chevy 1/2 ton.

http://s160.photobucket.com/user/st...novsky/ignition%20keys?sort=3&page=1

Note that they have the same # stamped on them, yet the actual key blanks are different. Can someone "in-the-know" explain this? Seems a bit odd to me. Thanks.

LUKE