H1X Calder 3

Found at the Calder Ironworks, Coatbridge by Ian Suddaby.

This example is not in my possession.

Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge.
Calder Firebrick Works, Airdrie, Lanarkshire.
Chapelhall Works, Lanarkshire.

Hepworth Ceramic Holdings plc (GR-Stein Refractories Ltd. parent co) bought the Bonnybridge Silica & Fireclay Co. Ltd in 1972, closed Bonnybridge works in 1973 and closed Chapelhall in 1980. Therefore between 1972 and 1980, GR-Stein Refractories probably continued to manufacture bricks with this trademark for a time.

Below – The short side is 9″ long. The top side is 21″ long. The curved side is 23″ long and the bottom side is 22″ long. It’s 4 1/2″ thick.


Below – Find location on the banks of the North Calder Water.

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