Oh heck, I've just noticed the swirls go in the 'right' direction! :shock:
I'd always assumed this was Filigran (Unionglas, German), but I'm not sure now. Erm, can you give me the exact sizes, pretty please
Could be a customised Chance item, so possibly quite scarce.
With regard to the gilt overlapping, this does occur on some pieces (carafe for example), but it might have been confined to older pieces as you surmise. Tony Cartwright mentioned that – he was quite definite about this – this was never a Chance feature. However he was 'only' at Chance from 1959-81!
The gilt does vary in brightness too. I've yet to determine any reason for this, but could be age related, or how it's been exposed to sunlight, etc.