I can tell you what the ancient 'Gun Traders Guide' says about the Model 25.

Takedown, Hammerless, caliber .22 short(20rds),longs(17rds),Long Rifle(15rds)

weighs about 5 3/4 pounds, 24" octagon barrel, open rear/blade front sights,

Plain pistol grip stock, grooved slide handle, Made 1925-29, value $325

This is from a 1998 published Gun Traders Guide. Ain't got any pictures of the Model 25, but sounds about like the Model 29 which would seem to be the 25's replacement.