BPCo Seal

BP Co Ligature in Triangle Seal, Image by StuE, Found by Roy Charlton.
Found in Essex. 20x18mm. 5.7g.
BPCO or BP Co ligature in an indented, inverted triangle on one side. The other is blank. The second of this type to be found.

Possibly BARCLAY PERKINS & Co ? See:- Barclay and Perkins Company Limited : owner of Anchor brewery 1781-1955