Unidentified Stamp

Unidentified Stamp
Arms:
Ermine an Eagle displayed between two flaunches or on a chief sable a trefoil slipped between two crosses patty or
Crest: In front of a demi eagle a trefoil slipped between two crosses patty fitchy
Motto: Alte volo
Helmet: Esquire
Dimensions (height x width): 73mm x 58mm
Heraldic Charges: chief, on acrosses patty (2)eagle displayed betweeneagle, demi-flaunches (2)trefoil

Sources