MCP, Mann, Crossman & Paulin Ltd Seal, Image & Found by William Robertson
Found in North Lincolnshire, 18mm.
Mounted horseman spearing a dragon // M. (C. P.)
A bag seal showing the distinctive George & the dragon emblem. No product company or organisation has yet been connected to this seal with certainty, however the trade mark of Marstons PLC is an excellent match.
Thanks to Paul Cannon for directing my attention to UKDFD : 20794 which shows the letters to be M.C.P.