Originally Posted by Absalom

It could have been a pre-Model 11 or Model 11, but in that case a five-digit serial with no prefix would make no sense (I know you know enough not to have overlooked a prefix). Any 4” early-war M&P in .38 S&W, like the South African contract guns, would have a six- digit serial. And S&W did not make any K-frame hand ejectors in that caliber in the early 1900s where a five-digit no-prefix 22-serial would place. I’m stumped, unless I’m overlooking something obvious.