Siroco (dual cable)
Main Photo
Category:  Rear Derailleurs
Name:  Siroco (dual cable)
Brand:  Siroco
Years:  Mid 1930's - ?
Country:  France
Added By: Catnap on 01/02/14
Updated By: peterbman on 10/31/14
Additional Photos - click for full size
Siroco (dual cable)Siroco (dual cable)Siroco (dual cable)Siroco (dual cable)Siroco (dual cable)Siroco (dual cable)Siroco (dual cable)Siroco (dual cable)
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Outer Plate Markings*unreadable* bte S.G.D.GInner Plate Markings
MaterialBronze; SteelDesign CategoryChainstay mount
Attachment Bolt SizeCable Attachment Bolt Size
Shifting SystemsFrictionCable AdjusterNo
Cage LengthLongMax Cog Size
Max Chain Wrap  
General Information
The Siroco seems to be a blend of both Simplex and Cyclo's designs of the 1930's -  like a Cyclo rear derailleur, the Siroco uses a dual cable.  However, the pulley actuates a plunger/rod assembly, which is similar to the operation of many of Simplex's contemporary designs.   Probably dates from the 1930s or 40s. 
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Additional Resources
Resources:Reference & Charts
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