Unidentified Stamp

Unidentified Stamp
Badge: A cinquefoil pierced ermine
Dimensions (height x width): 21mm x 14mm
Coronet: Earl
Heraldic Charges: cinquefoil
Notes:
Possibly William Hamilton, 11th Duke of Hamilton (1811-1863), who before 1819 was styled Earl of Angus. However, his dates cast doubt on this supposition.