Watch List notes:

George III, copper trial blank, c. 1797, for the 'Cartwheel' twopence, struck without a proper collar, one side counterstamped TWOPENNY, 1.6 ins. (40.79mm.), wt. 55.97gms., much as made and without wear, nearly extremely fine and an extreme rarity Matthew Boulton's contract for the production of copper pence and twopenny pieces to be struck at the Soho Mint, was finally signed on the 9 June, 1797. Boulton was to strike the twopences from 500 tons of copper and pennies from a further 480 tons, all of which he provided at £108 per ton (a second substantial order was placed the following year). A proclamation of 26th July confirmed that each penny should weigh 1oz. (avoirdupois) and each twopence 2ozs. The blank conforms with both the weight and the 1.6 inch diameter (5 coins side by side measured 8 inches). The cataloguers can only speculate that this piece was part of the pre-contract demonstration trials, and know of no further specimens.

Estimate: £300-500