it appears as though this is original, with all matching numbers and in very fine condition, with the exception of the grips which are a black plastic with the target marking - which I have read indicates probable East German/ 'vopo look' replacement grips. The S marking and all the other marks look unaltered. is possible to find the original fine checkered ( HRS) 1936 grips or suitable substitute? I have more research to do before asking about the magazine. thanks for any commentssn serial number is 933 , did kreighoff subcontract grips? and is this a huge devalue issue ?