Lead Trade Weight, Image & Found by Popsandme.
Found in the Wakefield area.
"its lead and weighs 83gms.....hole at the top with "139" on, the reverse is plain"
From Kev Woodward:- "At 83 grams it weighs almost exactly 3 ounces so a weight seems a good bet. The 139 is probably a local verification number as these were used in the Victorian period. In my weights book this number is for the County of Essex."