Copper-alloy, 3.51 grams, 43.27 mm. Circa 11th-12th century AD. A barrel key of Type II made by rolling sheet copper-alloy over a former. The bit is a simple rectangle. The key has a slender piriform profile. Reference: London Museum Medieval Catalogue 1930, reprinted Ipswich, 1993 p.136 and plate xxix. Very fine condition. Provenance: found Suffolk, England 2006.