WW1 conversion

[rhinemann]

I bought a G date luger and it came with this holster which was a artillery holster modified from my conversation with Jerry (Luger Holster Repair). What has me curious is that below the manufactures name is a droop eagle stamp with the code ZaJt indicating that it served a second life in the 3rd Reich. If there was manufacture date when it was a artilerty holster it has disappeared over time.
Did companies who reworked earlier holsters put the eagle stamp and their code on holsters that they modified? I cant believe that a leather company would not mark their work and I figure they would have been issued a code.
Because of the early eagle stamp would this be correct timeline for a G date Luger?
Also what is the double W stmp also located on the back stand for, rework?

Comment are welcomed.

Best regards

Jeffrey