check Rakow library for pattern numbers, e.g. Description books, no. 33-36, ware 38108-42889, Nov. 2, 1907 - July 11, 1911. But note pattern numbers refer to the shape and pattern numbers were not always issued consecutively in pattern books (in general, not specific to S&W). But it would give some indication of earliest use. Hajdamach would have had access to the original pattern books.