Watch List notes:

Boulton Shells, a rare offering of 10 Soho Mint copper shells with silvered interiors, four of which match up to form two complete shells, outside measurements of the sets 31 mm, the singles 32, 30.5 29.5(2),19.5(2)mm, excellent conditions.
Duplicates from the Hardcastle collection
Estimate: £200 - £400