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Hi All. Don - yours is an Islington 'basket weight' (I assume it has a spiral basket, and flat ground base). The other weight posted by marc is from a different, unknown factory, quite possibly in the UK... I have 7 weights or images of pieces from this factory (I think), and 6 were found in the UK. It should be lead crystal, with a concave polished base, that may not be quite circular. I have ones that have canes very like the centre cane and those in the outside ring.
Alan