Georgian bell metal Gloucestershire Troy weights

Georgian bell metal Gloucestershire Troy bucket weights. Six graduated cup weights, 32oz - 1oz, the largest formed as a carrying case with hinged lid, all stamped Gloucestershire and also bears maker’s mark AB and A.
English, circa 1750 - 1800, perhaps earlier
Height 2.5” (6cm) Max. Diameter 3” (7.5cm)
See: Gentle & Field p.19;  Copper & Brass by Hornsby p.252 and Collecting Copper and Brass by Perry p.148 & p.152