Found by Ian Suddaby in Bonnybridge.
This example is not in my possession.
Dykehead Fire Clay Works, Bonnybridge, Falkirk.
GR Dykehead – probably stands for General Refractories. (Note – SBH – A similar example found is stamped GR’s. Has the – ‘s – fallen off this stamp or is this a variation on a theme?).
GR-Stein Refractories Ltd – Formed by a merger in 1970 of John G Stein & Co and General Refractories of Sheffield. GR- Stein became a subsidiary of Hepworth Ceramic Holdings Ltd. General Refractories was formed in 1929. It acquired, amongst others, the Glenboig Union Fireclay Co in 1936, which became its Scottish holding company, and Dykehead Gannister & Fireclay Co of Bonnybridge, George Turnbull & Co of Bonnybridge and Castlecary Brick & Fireclay Co, all in 1936.