Austrian Patent # 154,423 - J.Wi.S scan 1

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Austrian Patent # 154,423 - J.Wi.S
scan 1 of 2

Publisher: Österreichisches Patentamt
Document: Austrian Patent # 154,423 - J.Wi.S
Date: Priority date November 1936
Derailleur brands: J.Wi.S, Wanderer
Derailleurs: J.Wi.S

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J.Wi.S 1938?