I was most certainly waiting in hope for Firko's contribution. There is no doubt that he is a wealth of info, particularly the older obscurities that rarely made it to Oz.
In the absence of "proof" I am still not convinced that it is a "Lyta". I have examined a few Lyta's, I would consider their craftsmanship to be good to very good in some cases, but by no means
first rate. The fabrication design and welding of this tank is/was
first rate.Pommy bikes had to have metal tanks to be able to compete, so I imagine the demand would have given rise to there being way more than one Pommy tank builder and craftsman. Most builders would and did choose the readily available Monza cap arrangement.
I have googled info and images on Lyta and cannot find this style(center section and ribbed)
Cz aluminium tanks were of the same design principle?
The one I saw with similar construction style was on a Pommy trials bike, I forgot to save it, but knew I should have
This tank has a very wide backbone tunnel. Haven't measured its volume, but it would not be a lot.