Got it at an antique store last week. All serials match on all parts inside and out including the magazine. It is a 1936 S/42. Underneath with the serial number 7414 is a "k". The condition is flawless. Checkering is sharp, operates perfectly. The small parts are blued, not the "straw colors", so maybe re-blue? Any more info on age, rarity and value in this condition appreciated.