Mike, thanks, that´s indeed interesting information.

Regarding the inspector: maybe he has moved and so far it hasn´t been documented. At least a possibility.

Regarding the stamp: I was looking once again on the instrument and to me it looks like the stamped surface is the only solid area to stamp on. The rest of the suction cannula is a thin tubing. I´m wondering what would have happened if he would have hammered his stamp onto that thin tubing? I assume it would have been damaged.

As I said, lot´s of speculation. I would love to meet a WW2 veteran doctor, who could give me his opinion on this set!