Hi, recently I came into possession of military trench periscope. I searched quite a bit on internet about the model (it's tag plate is unreadable) but was unable to find anything similar. Only model that resembled it was Japanese model (but a lot shorter) but the small tags on the side would suggest it's from Germany . If you have seen it, or have knowledge of, please tell me where it is from and rough value of it (is it rare or common?). Tags are: CARL ZEISS (it's probably lens manufacturer, pretty good quality from my understanding) and WINK HERNROHR 1. I'm not 100% on the second tag.
Any insight is appreciated, thank you in advance. P.S. Sorry if the lightning on photos isn't the best
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