Made of optically flat plates cemented together. Dimensions 50 x 50 x 50 mm
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Rectangular, all sides polished, made from slightly greenish glass free from bubbles Dimensions (a) 75 x 50 x 12 mm (b) 75 x 50 x 18 mm (c) 100 x 60 x 18 mm (d) 115 x 65 x 18 mm (e) 125 x 65 x 18 mm.
With holder & choke 80W & 120W
Optically worked, ground edges
Optically worked, in velvet lined case
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