Hi Can anyone tell me what the maker of this glass is please? To me, it's similar to the pictures I've found showing Northwood Royal Ivy, but I think it is slightly different? The metal base tray and lid have Silver Plated and made in England impressed. I know some companies imported glass to finish their product, but I don't know if that's relevant with this item? The glass has a soft iridescence to the outer layer encasing a clear glass interior. any info would be great please?