TC — You put me off this topic by your reference to a marble. I know nothing about marbles apart from collecting children's marble games.
Now, TC, you're going to have trouble believing this, and I don't know how you are going to establish whether I am joking or not!
Your marble isn't a marble, it's a foot. Specifically, I'm reasonably sure it's one of the four feet off the oval mirror plateau base of the crescent-shaped centrepiece by Thomas Webb, Rd No 297634 of 14 January 1876.
Sort that one out, if you can! :cheers:
Bernard C.
