Spurred Groat Public Deposited
A name given to the Scottish Groat, introduced by David II (1329-1371).
Snelling, View of the Silver Coinage of Scotland, 1773, states that the expression arose from the mullet or spur in the quarters of the cross on the reverse of these coins.
- Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)