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Trade my rare bird Clave 40 mm for your Zeiss H63

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Hi folks, I put "on market" my extra rare Clave 40 mm very first series (with the unique Paramantois french glass) probably from '50s - early '60s. I found a similar one only pictured in an advertisement from "l'Astronomie" of 1963. Very good condition for the age. Barrel is 50 mm Clave (not 50.8 mm). I'd like to trade only with a Carl Zeiss Jena H63 (or larger H....), W31S, or a pair of 1,25" Clave 4 and 5 mm. I can evalutate trade with a other very rare Zeiss item. Make your proposal, please.