One of first 500 of contract C14498 with leg shields
This one on ebay was for sale before I went to Normandy, looks like it sold for £533 http://www.ebay.co.uk/itm/norton-16h-big4-es2-war-wd-original-frame-numbers-w16481-/351405414086?pt=LH_DefaultDomain_3&hash=item51d16516c6
That French frame is an early WD example - Non-reinforced fuel tank mount and no field stand lug. Mid-1940 at the latest.
