Unidentified Stamp

Unidentified Stamp
Crest: A demi lion rampant double queued holding in each paw a fleur-de-lys
Motto: Artis er artis hono
Helmet: Esquire
Dimensions (height x width): 58mm x 46mm
Monogram: M S
Initial: M S
Heraldic Charges: bend, on afleur-de-lyshorses heads (3)lion, demi-mullets (3)

Sources