• Octo 41

    Found at the old Ravenscraig Steel Works, Motherwell. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge.

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  • Bonnybridge Brand

    Found in Glasgow. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick Works,

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  • 1 Calder

    Found Glasgow. Note the finger print to top right. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge.

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  • Bonnybridge H

    Found in Glasgow. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick Works,

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  • Calder

    Found in Glasgow. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick Works,

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  • – Calder

    Found at Ardeer, Ayrshire Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick

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  • Calder O o

    Found in Glasgow Note the thumbprint to top right. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge.

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  • Bonnybridge 18.8

    Found at South Queensferry. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick

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  • Bonnybridge 33

    Found by Ian Suddaby in the Bonnybridge area. I am not in possession of this example. Bonnybridge Silica

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  • Bonnybridge 1915

    Found by Gordon Wyle at Bonnybridge. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder

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  • 12 Calder

    Found at Kilwinning, Ayrshire Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick

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  • Calder XL

    Found near Kirkcaldy, Fife Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick

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  • Bonnybridge 3542

    Found at Drum Farm, Bonnybridge. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick

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  • 2 CUR

    Found Drum Farm, Bonnybridge. Unidentified maker. The find location would suggest Scottish origins but

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  • Octo –

    Found Drum Farm, Bonnybridge Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick

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  • Bonnybridge FCC

    Found at Drum Farm, Bonnybridge. Although the FCC is off centre and suggests there are some missing letters,

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  • Calder L U9

    Found Drum Farm, Bonnybridge Calder Firebrick Works, Airdrie, Lanarkshire. Bonnybridge Silica & Fireclay

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  • Celtic

    Found at High Bonnybridge. Unknown maker. The find location would suggest Scottish origins but …

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  • Bonnybridge

    Found at Drum Farm, Bonnybridge. Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

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  • Bonnybridge 45

    Found Bonnybridge Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire. . . . .

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  • Bonnybridge

    Found Drum Farm, Bonnybridge. Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

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  • Bonnybridge

    Found Drum Farm, Bonnybridge. Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

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