This was a request to make a replica of the enamel teardrop which was attached to Marc Bolan's guitar.
(white Fender Stratocaster).
...an interesting challenge.
The second interesting request was a repair.
This was a silver pendant which had badly damaged (and replaced) enamel?/resin.
When I checked the hallmark it was AR Iona.
I then discovered the work of Alexander and Euphemia Ritchie and their Celtic Jewellery from Iona.
It was so interesting to read that Alex and Euphemia had met at Glasgow School of Art
in the 1890s
IONA Celtic Art - by E.Mairi MacArthur.