File:KoppWalkLens Obverse Full.JPG
KoppWalkLens_Obverse_Full.JPG (500 × 461 pixels, file size: 83 KB, MIME type: image/jpeg)
The front view of a Kopp Striped walk lens.
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|current||19:11, 28 May 2016||500 × 461 (83 KB)||SchoolcraftSignal||The front view of a Kopp Striped walk lens.|
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