Copper-alloy, 28.70 grams, 65.33 mm. Circa 1st - 3rd century AD. A heavy duty key from a tumbler lock, with a wide shank and suspension loop above. The crooked bit has teeth to fit the tumblers in the lock. Ref: Benet’s Artefacts, page 216, fig. R17-0205; Celtic and Roman Artefacts, page 80, fig. RB237. Good fine condition. Provenance: found Huddersfield, England.