Debenham Sisters
Betty and Nancy Debenham, with their dog, Poncho, were keen motorcyclists. Nancy won a Gold Medal at Brooklands in 1926.
The Debenham Sisters
As with so many of the articles on these pages, this particularly interesting machine was forwarded by Bennie Ludolphy which includes some excellent photographs* of the ERLA-JAWA iceracing engine made some years ago by German tuner Erich Lawrentz.
As you see there is on the JAWA bottom half a DUCATI desmodromic 2 valve head very similar to that on the machine from Dutchman Gerrit Rook, which uses the same layout. However, this engine was made before the Rook machine.
See also ERLA
* One or more images