Manufactured in Valencia between 1948 and 1963
The firm branded their products as David, AS, ASB and SB, and produced diesel engines, auxilliary bicycle engines and, under the SB marque, complete motorcycles.
S.B. autocycles had engines of 76cc to 98cc capacity and were available in ladies and gents styles.
NB. There was also the unrelated Autociclos David (1913-1923), and the Davis SA (1949-59) which was possibly built by by S.B.
Sources: wikipedia.ca, jacques-leretrait.blogspot.com
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