In 1986 Colt made 4, 150th anniversary guns. In addition to the double
diamond set, there was the engravers sampler and the army 45, 50%
engraved. Here is the set of 4 I own, all with matching serial #'s.
The pic of all 4 is the catalog pic that came with the set.
I'm going to enjoy them for a few more weeks and then off to auction.
Keep an eye open for this set.