captwk said:
When I say thick I'm talking about height
Now we are confused !
The tin cases have a slight taper to them, so when you lay the giant rubber band out on the faces,
they press together so the rubber band is sandwiched between the tin covers.
Large lashings of silastic may be necessary to get it to seal...
I still remember I bought a NOS ex-army one, and when it arrived it was curled up and like a rock.
I mentioned this to the seller, some time later, and he said didn't you soak it in brake fluid (heavy alcohol),
they soften right up and can be fitted to anything.
I have a good one stashed away some place, could measure it if it would be helpful.
But that soaking in brake fluid is the trick.
(if modern ones are up to it !).
Just had a quick look - the new one here is about 7/8" wide, and 3/8 thick.
I'm not aware they came in any other size ?
If the cases have been bent or overtightened and distorted, fit can be a problem...