First, we don't even know if they are S&W. Second, the only stocks smaller than an I frame were 32 Top-break, 32 Safety revolvers, and 22 Hand Ejector (Ladysmith).
If you look at the contour of the grips they don’t match that off a Smith & Wesson. They are likely early Iver Johnson’s.
Pearl Grips don’t swap between manufacturers. Sometimes it’s close but no cigar.