Location of serial numbers on 1917 Military DWM? FAQ's

[Edward Tinker]

nothing on rear of receiver normally - in very few cases with weimar and earlier you sometimes find a couple of digits - rack number probably

please take the Standard Catalog of Lugers with a grain of salt, there are lots of mistakes there - such as - lists Simson's each variation separately, but then repeats the 'total'amount - so it would appear that 30-40k of them were made.