Unidentified Stamp

Possibilities for Identification: 
Possibly a Continental stamp
Height: 
38mm
Width: 
36mm
Full Heraldic Description: 
Arms On a bend three spearheads [?] a mullet for difference
Arms: 
On a bend three spearheads [?] a mullet for difference
Heraldic Charges: 
Stamp Key: 
IZZZ065