I'm sure Colt had some kind of name for the set, unless this was a Custom Shop special run for some distributor or business.
The best info you're likely to get would be to buy a Colt Historical Letter from the factory.
These cost around $100.00. The letter is a document-grade frame-able letter listing everything Colt knows about the guns.
This would include the ship date, finish, grips, barrel lengths, and any custom features.
Since this was a set, they would tell you WHAT set or issue it was, and whether it was a factory special or something custom made for someone else.
In this case, the letter would be money well-spent, since it would add to the value of the guns.
Look under the Archive Services tab.