30mm. Cupro nickel. 12.4g. Unsigned but by Hugh Graham Conway.
Decimal trial or pattern Fifty Pence struck on a 10 sided flan. 50 on either side.
About Extremely Fine and very rare.
These trials have been seen with 12 sides and with a 'squircle', a square with curved edges. However, we can find no comparable example of one of these trial coins with only 10 edges.