Chance made thousands of different ones for a variety of commercial ventures and, as you can appreciate, it would be impossible to try and catalogue them all.
I don't appreciate, the Internet is here
worth trying and a better name is custom glassware. Custom comes across in many languages too.
If you're saying I should try and catalogue them all, then I'm not sure I have the time or effort to do this. The problem is; there are
no records* of what was produced so it
really would be impossible to catalogue them all (I wasn't using the term glibly!) These trays were produced from c.1953 (Royal Coronation) right until the mid-1990s and I think it would be a task-too-far — besides, is there sufficient interest to justify all this effort?
But if someone else wants to take on this task, I'll give them all the support they need.
I believe Chance called these trays 'Promotional', however to try and distinguish between the different types I started to use terms like 'Mottoware' & 'Crestware' (already used for pottery), and so on. I'm quite flexible though so am happy to listen to any advice. I think they do need categorising somehow.
* The best bet would be Pilkingtons, but they remain rather unco-operative and I have heard a rumour that their archives (of Chance) are not really "accessable"... I think I know the reason but would prefer not to say here.