Quote Originally Posted by Shed tuner View Post
As I have just found a 29mm seal in my spares that I had assumed was a diana 28mm seal (same parachute, ploy type seal with a female centre tovetail fitting, like a TX). But at a full 29mm (maybe 29.2), it's never going to go into a 28mm tube...

It might actaully go well in my britinia, which is about 28.5 - with a little resizing, but curious what it's for ?

Rgds - JB
Hi Jon, I’m currently rejuvenating an asi magnum of 80s vintage, which was very kindly donated to me from Richard H, the cylinder is indeed 29mm & the seal is exactly as you mention.
Regards Graham