• Octo 40

    This was found by Tony Gray in the Wearside, Sunderland area. This example is not in my possession. Bonnybridge

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  • P Calder

    Found by Ian Suddaby in the Falkirk area. This example is not in my possession. Bonnybridge Silica &

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  • 1 Calder

    Found by Ian Suddaby in the Gorebridge area. This example is not in my possession. Bonnybridge Silica

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  • Calder

    Found at the site of the Calder Ironworks, Lanarkshire. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge.

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  • Calder 2

    Found by Ian Suddaby at Niddrie, Edinburgh. This example is not in my possession. Bonnybridge Silica

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  • Bonnybridge 725

    Found by Ian Suddaby at the Niddrie Fireclay Works in Edinburgh. This example is not in my possession.

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  • Calder British Made

    This example was found in an old Bakery, Resistencia, Chaco, Argentina by Deigo Maciel. Bonnybridge Silica

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  • 8 Calder

    Found by Eddie McLean in the Glasgow area. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt

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  • Bonnybridge Brand L

    This example was found in Edinburgh and is in the possession of Ian Suddaby. This is not in my possession.

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  • Octo 10001 K

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

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  • Bonnybridge Brand

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

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  • RF & Co

    Found among flytipping at the Darngavil Brickworks, Scotland. This stamp is believed to represent Robert

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  • Bonnybridge D 5

    Found by Tucker Kennedy in Ayrshire. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder

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  • Calder 6527

    Found by Tucker Kennedy in Ayrshire. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder

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  • Bonnybridge 8 1/4

    Found by Ian Suddaby on the banks of the tidal River Dee below the site of the Ferryhill Foundry, Aberdeen.

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  • Calder L 40

    Found by Eddie McLean in the Glasgow area. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt

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  • Octo

    Found by Eddie McLean in the Glasgow area. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt

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  • Octo 7774

    Found at Inverkeithing. Octo 7774 – it may be stamped 17774 but I think the ‘1’ is

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  • Calder 3

    Found by Eddie McLean in the Glasgow area. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt

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  • H1X Calder 3

    Found at the Calder Ironworks, Coatbridge by Ian Suddaby. This example is not in my possession. Bonnybridge

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  • 8 Calder

    Found at the site of the Calder Ironworks, Coatbridge. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge.

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  • 1909 Calder

    Found by Ian Suddaby at the old Calder Iron Works site, Coatbridge. This example is not in my possession.

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  • Calder

    Found Manuel Works, Whitecross by Gordon Wyle. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge.

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  • Atlas Coatbridge

    Found in the Ayrchire / Lanarkshire area by John (Ian) Jones, Ayrshire. Calder Fireclay Co., Coatbridge. Telephone,

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