Bicycle Seat

Bicycle Seat

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The “88 / Gauthier Brevete S. G. D. G. / 11 75 / Rilsan” inscription indicates that this black bicycle seat is made of Rilsan, a plastic substance derived from castor beans. Organico, a small French chemical firm, obtained a patent on the substance in 1947. In 1949, this substance, a Polyamide 11, was brought to market as Rilsan 11.
Currently not on view
Object Name
bicycle seat
overall: 3 1/2 in x 6 in x 11 1/2 in; 8.89 cm x 15.24 cm x 29.21 cm
overall: 76 mm x 152 mm x 267 mm; 3 in x 6 in x 10 1/2 in
ID Number
catalog number
accession number
Credit Line
Gift of J. Harry DuBois
See more items in
Medicine and Science: Physical Sciences
Data Source
National Museum of American History
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