Ahh, the good old days!
Didn't Chippy take a wheel into a supermarket once to check the fit?
you did not tell us the use for 303 shells on your Moke?
Sorry Seamoke..... was probably trying to hide from Mrs Maddog at the time.
She sends me to her room when I've been naughty....
I used a couple to repair the square Hella tail lights. The peg the lens screws to had split and the screws wouldn't hold, so glued a cut down 303 shell over them.
It's a perfect fit.
Cheers, MD.