A 25-5 in 45 Colt is a 25-5. Before that in 45 Colt there was the 25-3. It had a shorter cylinder and more barrel thru the frame. I wouldn't call it a reproduction any more than a I would a 25-9. Just a later model. Other than the 25-3 I don't know what it would be a reproduction of. I think all the pre models in 45 where ACP. The 1950 and 1955. A very few 1917 came with adjustable sights but, had a slightly different frame in that it is round at the barrel junction and had a round thin barrel and was of course a 45 ACP.

Calling your 25-5 a reproduction is like calling a model model 15 a reproduction of an early 38 M&P