Unidentified Stamp

Unidentified Stamp
Crest: A leopard (lion?) rampant
Dimensions (height x width): 25mm x 14mm
Monogram: D C L
Heraldic Charges: leopard
Notes:
Leopard rampant not in Fairbairn’s Crests. The only candidate in Papworth is Lincolne, but the entry has insufficient evidence.