The Model 25 was made with 4,5,6,6.5 and 8-3/8" lengths and in .45 acp and .45 Colt.
My Dad had a 125th Anniversary and a Model of 1989 with a 5 in barrel, unfluted cylinder .45 Colt. I really liked that Mod. of 1989.
They are worth $550 to over $2000 depending on the condition and rarity. Usually the older pre 25 5-screws and early S prefix 4-screws are the ones that bring the high prices.
I would really like to have an early 4in one in .45 colt.
Here is my 5-screw .44 Magnum made in 1956 the first year of production.
It really doesn't have anything to do with your question I just like showing it off.