Featured on the Douglas stand at the 1934 Olympia Show, the Endeavour was the first Douglas transverse HO twin. Designed by Eddie Withers and Jack Clapham, it used a side-valve engine, cardan shaft and a four-speed gearbox, retaining hand-controlled gear change. It did not appear in the 1935 catalogue. It is believed that only 200 were built (though opinions vary on the actual figure), and the list price was a high £72-10-0. Sales were slow, and they were remaindered by Pride and Clarke for 49 pounds ten. Even that was expensive compared to 1936 when Pride & Clarke advertised the standard configuration 600cc SV for a mere £32.

Adapted from a brochure posted to Early Motorcycle Literature by Steve Cee.

Douglas Models of the 1930s