2992xx would date its shipment as being in 1919. The closest on my list is SN 2996xx shipping in 6/19. Yours was made shortly before heat treatment of the cylinder began in September 1919. S&W would have called it a round butt Military and Police (M&P) Model. Personally I wouldn't spend a penny to get it refinished as it has only moderate value. Refinishing won't improve its value, only its cosmetics.