Calder brick found in Argentina

Many thanks to Gustavo Coronel for the following information.

The brick was found by Jorge Villafañe at Los Hornos de la Ochoa, Malagueño, Córdoba, Argentina.

There may be a thumbprint to the top right.

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

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