Set comprising of 3 WWII-period, metal-based technical-equipment identification-tags

This is an unsual - albeit surely interesting! - set comprising of three WWII-period, metal- (ie. aluminium-based, engraved and/or neatly black-toned) technical-equipment identification-tags that come all three in an overall nicely preserved, condition. The set was recently found together at a German private-household and was most certainly kept for decades as souvenirs. The 3 tags (ie. placques) were once attached to various technical WH- ie. 'Kriegmarine'-related equipment (taking into account the engraved text and or codes I deem WH optical-instruments). The plaques measure respectively: 7,5 x 5,5 cms. (2x) and 6 x 4 cms. My asking-price is naturally intended for the set of all three examples.

Code: 67669