Unidentified Stamp

Unidentified Stamp
Crest: Out of a ducal coronet an oak tree entwined by a serpent descending
Dimensions (height x width): 17mm x 10mm
Heraldic Charges: coronet, ducal, out of aserpenttree (oak)
According to Burke’s General armory, this is probably the crest of O’Reilly [Riley; Reilly]. One branch of this family who used this crest is from Baltrasna, county Meath - the county being the subject of the book cited.