Its the old style where the barrel and cylinder tip forward. I believe it's 32 s&w
That leaves two possibilities. If it has an exposed hammer then it's a 32 Double Action 4th Model. Serial numbers ran from 43406 in 1883 to 282999 in 1909.
If it has a concealed hammer (with grip safety) then it's a 32 Safety Hammerless 2nd Model. Serial numbers ran from 91418 in 1902 to 170000 in 1909.
Either way, value is not high. Runs about $400 to $500 in excellent condition.