So it would have taken some effort to create the E, L and A. Unless the font at that size was in common decal use in other model kits of the time, perhaps? Thanks for the information!
E N T E R P R I S E
C O N S T E L L A T I O N
Whoever did it would also need a C, and two O's, unless you think the decal sheet had the word "Constitution" on it, which it didn't.
Nope, the ship's name would have been generated from whole cloth. I suggest it was made from dry transfer letters purchased from a blue-printer somewhere in L.A. And just the registry number was rearranged kit decals. After all, why buy a second sheet of letters in a different point size when you have perfectly good characters waiting to be easily cut up and rearranged?