This is in my top ten. One of the cool things I find about the Golden Age books is doing some background research. I found the motorcycle shown may well have been a “Type 97.” These motorcycles were built in Japan and were derived directly from the Harley-Davidson Road King. During the height of the Great Depression, Sankyo Company purchased both a licence for the design and equipment for manufacturing it from Harley-Davidson in 1932. Production began in 1933 at a factory near Tokyo, Japan with Harley-Davidson employees on-site as consultants. But Japan’s increasingly militaristic government soon forced the Harley-Davidson employees to leave the country.
These bikes proved popular and Sankyo Company named its motorcycle producing subsidiary “Rikuo,” translating roughly into “Road King.” The 4-cycle, 1200 cc, side-valve V-twin engine generated 28 horsepower with a top speed of 97 km per hour.
Rikuo built approximately 18,000 motorcycles between 1937 and 1942. Sidecar versions were made for military work and saw active duty in China as soon as they were introduced in 1933. They also saw combat in the Philippines. Solo machines were supplied to civilian police forces. Production would continue right up to the end of the WWII. After a two-year pause, the Rikuo company resumed production of motorcycles in 1947, but the Type 97 design was not among those built. In 1951, under the new ownership of Showa Corporation, Rikuo resumed production of the “Type 97″ Road King design for the civilian market.