Hi
The tank on the first bike looks like an early vic camp tank as an original bike on our site:
http://www.laceyducati.com/ducati-parts ... -1177.htmlThe second bike was sold by us and the tank was a Vic Camp replica tank made of alloy. Later Vic camp tanks were more rounded and similar to the second bike. However the later original tanks were fibreglass and had a semi sunk in flip filler to the right hand side.
As to whether the tanks Vic Camp supplied in the 60's/70's were original to him or copies of Italian tanks I don't know, before my time! I understand they were UK manufactured and have been copied by many ever since,
Best Wishes Nigel