[DonVoigt]

The receiver has the "artillery" sight cut, so you are probably correct , but the date and original military markings have been removed. No way to guess what year the receiver was made; and the frame is likely not associated with the original receiver anyway. JMHO.

It was likely assembled in Suhl between the wars, but no particular connection to Kreighoff, as the Suhl proof marks were applied by the proof house to any and all lugers submitted to them for proofing.

It could have been assembled by any of a dozen or more gunsmiths or operators in that time.