Because the second model could be ordered in 45, we probably don't know how many were made.

Sasha Siemel stated repeatedly in his jungle books that he and many others in Brazil favored S&W .44 revolvers. But he didn't identify the models, or the exact .44 cartridge. He owned a Winchester .44-40 carbine and was friendly with Dan Wesson. Might his gun have been in .44-40? The ammo was probably more available in Brazil then, as the Winchester M-92 was so popular there. Rossi still makes a good copy of it.
I doubt that .44 Spcl. was as available.

But how many .44-40 S&W's do we KNOW about today? The same may apply to .45 Colt chamberings. But I think that most wanting a .45 Colt bought a New Service. S&W listed the .45 on order, but probably discouraged such orders. And the New Service handled recoil better than an S&W, prior to the Magna grips.