This Triumph 3SW appears to have a knights helmet emblem on its petrol tank,cant find this one in any book I have,some one may know what it is,photo is from an article on servicing WD motorcycles that's why the electrical parts are shown darker. 
It is indeed...Formed in the UK and sent to Africa at the wrong time the division was completely over run by Rommels forces during his first advance in the desert...
Most of the division was captured or destroyed including the HQ units..It was not reformed afterwards and that is why the markings are not seen often...
Here's a 5SW I restored in the same markings a few years back...Ian
email (option): ian@wright52.plus.com