Unidentified Stamp

Unidentified Stamp
Arms:
Quarterly 1 & 4 A cross 2 & 3 A lion rampant
Crest: A lion rampant
Helmet: Esquire
Dimensions (height x width): 53mm x 43mm
Quarterings: 1 & 4 A cross 2 & 3 A lion rampant
Heraldic Charges: crosslion rampant

Sources