Unidentified Stamp

Unidentified Stamp
Crest: On a chapeau turned up ermine a lion passant crowned, collared, charged on the breast with a mullet
Dimensions (height x width): 23mm x 22mm
Monogram: C K
Initial: C K
Heraldic Charges: chapeau, on alion passant
Notes:
Not in Fairbairn's Crests. Encyclopaedia heraldica, and Burke's General armory give King (Leicestershire) as the only crest belonging to a person whose surname begins with K. But the lion is neither collared or crowned.