If it's an 1889, then the caliber would have to be 32-20, not 32 Win. Sp. If it's indeed 32 win sp., then it's not an 1889 and it's a 1893.
Any more pics. The easiest way to tell an 1889, is the little spring loaded lever locking nub behind the lever on the bottom of the buttstock wrist. Does it have that?