Smith & Wesson Russian, .44 Russian cal. single revolver.  Serial #33645, mfg. 1873-1878.  Antique.   Commercial model.  Fair condition.  7” barrel has very good bore with strong rifling.  Fixed sights.   Barrel and frame have old brown finish with surface corrosion, edge wear and dings.  Cylinder has lots of fine surface corrosion.   Correct trigger guard with spur. Smooth walnut grips have some marks and notches. Single action works OK – lock-up slightly loose.  Straight, honest model.   Antique, can ship to your door.