[mecano44]

Hi

100 mm barrel Erfurt Lugers dated 1917 and 1918 have generally a machined recess for the artillery sight , on front of the receiver.

Now what about 1914 issues ? Somebody offers me such an Erfurt , that seems to have ( according to pictures ) the original barrel, but with this recess on the receiver

Is it possible that somme serials of receivers , machined for the artillery barrel, were finally issued with the standard 100 mm barrel ? maybe just to finish a batch ?

thanks for the help