Yes, sorry John but there isn't anything in Manley eek.
However, I like to have his book regardless that I wouldn't use it for id. It has lots of items in it and also he has lovely musings ... and was putting together his thoughts in isolation pre internet etc.
Funny you added those two. What caught my eye on flicking through various memory jogging pics last night were, I think, two of that shape or similar in the opalescent cream with green trails and I thought the green looked quite similar to the trails on yours.
I agree about the device used to hold them - that's the only explanation I could come up with.
m