... I don't recall seeing an example anywhere. It might be wise to show the Tazza to Roger Dodsworth. ...
Kevin — Thanks for your considered reply. As it happens, I did show it to Roger at Broadfield House, about ten days ago. It was he who suggested that it was threaded in green, not amber, as I had previously supposed. It was only today, catching it in the sunlight at a particular angle, that I could clearly see the green. There is little or no response to my UV tester.
... It's a pity that there was no illustrated example of "Moresque" in the Hajdamach book. ...
I got the strong impression that Roger hadn't seen one before, or at least not one quite like it. He certainly spent a long time examining it. If Broadfield House does not have one in its collection, that would explain the lack of a photograph in Hajdamach.
Thanks for your sensible comments about image dimensions, file sizes and bandwidth. Unfortunately the few of us who take these matters seriously are a tiny minority.
Bernard C.