The goggles look visually correct to me from the pic. However, I find it suspicious that someone deliberately took the time to scratch off the maker mark on the back and to the right (which should read NiGuRa). There have been some very interesting threads on repro N&G goggles by some very knowledgable and experienced luftwaffe collectors on this forum. If you go to search and look up "goggles" or "N&G goggles", I think you will find them.
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