I sent the photos to Andrea a few days back, and his reply was as I stated, that he had not seen anything like it before. But certainly post it to German Helmet Valhalla where he is a moderator and heavily involved in the Imperial German steel forums. He will definitely reply there.
I believe it was Oliver Lock that John was referring to as ‘taking time out’. Oliver is quite active on some of the WW1 groups on Facebook too. His new book on German WW1 helmets is excellent.
Andy
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