Hi,
I've recently purchased a small hotworked triangular ashtray, but can't figure out which glassworks it comes from... ZBS, Skrdlovice, other? Does anyone recognise it?
The piece is 6,5cm tall, 14cm wide and weighs 865g (quite a bit for its small size). There is an indentation towards the bottom of each side, and only one cigarette rest. There is quite a bit of wear to the base. I did my best with the photographs, but it's a terribly difficult piece to capture well.

All help and comments appreciated.