I have a giant lens marked R. Walzl, Baltimore. No. 10,033 It doesn't have the drive anymore but it appears not to be the earlier radial type. Maybe there was some overlap with such a large lens being mfr.d but not sold so that it was transferred to Walzl even though the HBH numbers extend slightly beyond this? Or maybe it's something else altogether? It's large enough to be perhaps a 20 inch f3.8 but it is missing one rear glass, so un-usable.
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