French Patent 785,015 Addition 47,985 - BGA Velectrik scan 1

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French Patent # 785,015 Addition # 47,985
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Publisher: L’Institut national de la propriété industrielle
Document: French Patent # 785,015 Addition # 47,985 - BGA
Date: French application January 1937
Derailleur brands: BGA
Derailleurs: BGA Velectrik

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BGA Velectrik 1935?