Unidentified Stamp

Unidentified Stamp
On a chevron between in chief two lions combattant and in base a garb three annulets
Crest: Out of a ducal coronet a griffin’s head erased holding a broken arrow point downwards
Motto: Spes mea in Deo
Dimensions (height x width): 128mm x 64mm
Heraldic Charges: annulets (3)arrowchevron, on a, betweencoronet, ducal, out of agarbgriffin's headlions rampant combatant (2)
Motto not in Burke's General armory, nor in Fairbairn's Crests. Arms not in Papworth. Crest not in Fairbairn.