Saw this on ebay this morning. No, they are not mine...lol....I agree with the seller that they are a rare finish, and being keystone badges with this finish makes them rare as well. That would date them to 1968 or 1969 depending on what the serial numbers are. However......I think they are way off the mark on the price! They are not dead mint, far from it by the looks of the pictures, and its not a rare size configuration.
Opinions?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=120477826721&ssPageName=STRK:MEWAX:IT