Just dug this out
Brilliant. Love it , and I've never seen one either
This time some ' online ' digging ! reveals it originally came in a copper protective box
No Mick ...... it was used for keeping pickled onions in at the houses of parliament lummox
Looking at the surface wear I would say used mainly in the London area
Would love that pot to go with my other London area hospital items ! The metal holder is a surprise !