Early very big heavy Brass Lens of Emil Busch,
Outer dimension:
height ca. 30 cm
front diameter total ca. 13,5cm ( with flange ca. 18cm )
rear diameter total ca. 13 cm,
Front/rear glass have small separations - for details check pictures please
Diameter of front glass only ca. 11cm
Diameter of rear glass only ca. 12cm
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