The Dureel sets were late 1930s - certainly not post-WWII. They also featured some hidden cotters which I will try and find a picture of.
Hilary Stone, Bristol, England
> From: mozzi-3@att.net (Seth F.)
> Date: Sun, 23 Apr 2006 20:41:37 +0000
> To: classicrendezvous@bikelist.org
> Subject: [CR]D.Granger's Hobb's cranks-dureel?
>
> Hi Folks:
> Duncan Granger shared his very British-of-a-certain-age Hobbs with us in some
> yahoo pix.The distinctive chainwheel on that would be the Williams
> "dureel",which I've only seen in drawings.My question to people of old local
> knowledge is if that name means dural rings on steel arms,and,just how short
> was the production life of those critters?
> Thanks a lot,hopefully,
> Seth Finkelstein,Santa Cruz,CA