I’ve been scratching my head about this since it appeared in The E-Sylum last week. I don’t know who the Celtic collector was, but in answer to the query this week from Ron Haller-Williams, the type with a ‘minter’ on the reverse is easy enough to pin down: the so-called Cunobelin metalworker type, listed as ABC 2969 in Cottam, de Jersey, Rudd and Sills (2010), Ancient British Coins. A picture of one is attached. As you can see it is not a minter – he seems to be working on a bowl – but it is not uncommon to find the type described as a mint worker in the early literature.

The "minter at his work" coin is probably the well-known "metal-worker" type of Cunobeline - V2097. See the plate and description on my website: www.vanarsdellcelticcoinageofbritain.com/plates/plate_85.html

I'm going to see if I can identify the manuscript author through the handwriting. Not the kind of thing you can do quickly. It's definitely not William Stukeley.