I think during that 'gun of the week' period there must have been a ton of short run models made.
I have a model 19 with a 3" full underlug barrel, bead blast blue finish, no hammer spur from the performance center commissioned by Lew Horton. According to the book only 75 made.
How about one of those "Deep Carry" revolvers...
A 442 with an all aluminum cylinder and no front sight made for the Secret Service?
Am I correct that there is only one surviving one of those?
Rumor has it that they had a crack down internally on "one offs" and prototypes getting out of the factory...something to do with ATF (BATFE now) inspections, loan accounts, and what-in-all...all rumor I suspect.