Parnell's Defiance Padlock.
Artifact No. 21. D: 19th century. Sn: 1666. CoR: England.

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Lock Sz: 57 x 85mm.Mt: brass, steel. Wt: 296g.
Key Sz: 37mm. Mt: steel. Wt: 6g.
Marked: ĎParnellís Patent 1666 Defiance Patent Lock, 52 Strand, Londoní. Patent (No.13,806, 6th November 1851)