'Iestyn Davies worked for Stuart Crystal from 1985 to 1987 after leaving Stourbridge College of Art. He becamethe resident coloured glass artist. In 1986 he designed some new glassware ranges including the Ebony & Gold and Dark Crystal ranges (see below) - these were only produced for a short period.
In 1987 he set up Osiris Glass at Broadfield House Glass museum in 1987.'
Source:
http://www.ysartglass.com/Strathearn/Strathearn.htmSo from 1987 he set up Osiris glass - glass presumably signed and also used labels (have seen labelled piece).
From late 90's he set up Blowzone at the Centre - so perhaps he worked at Broadfield House for 10 years or so then moved to the Centre. I have a perfume bottle that the owner said was bought at Broadfield House when he was working there. I think I recall that was
mid 80's. (it was 80s she said, not mid - link to bottle attached now) She therefore presumed he made it (unsigned but very possibly his work, nothing about it to suggest it wouldn't be, but I've not checked with him yet). Edited to add, it's worth noting thought that my perfume has a cut and unpolished rim on it.
http://www.glassmessages.com/index.php/topic,37355.msg204504.html#msg204504m