I'd hesitantly suspect it to be Czech, maybe Chribska (the clear encasing, the small lobes and the way it's folded inward - though I've never seen this particular form), and maybe not very old (colour is a bit bright). But that's nothing more than a gut feeling, sorry. If someone corrected me and said with more confidence it was Murano, Scandi, Brittish or Canadian, I'd gracefully bow out

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