George III, 1760-1820. Penny, 1797. ‘Cartwheel’ Type. Turned And Fashioned As A ‘Smugglers’ Box, With Screw Thread. The Two Halves Screwing Smoothly To Join As One Coin. The Box Fashioned In The 19th Century Or Earlier.
 
Reference: S. 3777.
 
A rich old brown chocolate tone, a slight dent on reverse. Some other light surface marks. The screwing action smooth and working well.