• Bonny Bridge

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

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  • Novo Seventy

    Found on Drum Farm, Bonnybridge. (Note – SBH – This is different to the similar stamp found

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  • Bonnybridge 24 R

    Found on the banks of the Bonny Water, Bonnybridge. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge.

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  • Bonnybridge R 10

    Found on the banks of the Bonny Water, Bonnybridge. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge.

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  • Bonnybridge B

    Found in woods once owned by the Bonnybridge Silica & Fireclay Co Ltd near Drum Farm, Bonnybridge.

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  • Novo Seventy

    Found by Ian Suddaby at Grangemouth. Note the lower leg of the second E’ is missing. Bonnybridge

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  • Calder 118

    Found by Eddie McLean in the Glasgow area. This stamp is likely to have had at least 4 numbers. Bonnybridge

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  • Calder C 12

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

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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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  • Octo 42

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

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  • 36 Bonnybridge

    Found by Ian Sinclair on Newshot Isle, Inchinnan, Renfrewshire. Bonnybridge Silica & Fireclay Co

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  • Bonnybridge 2 8 2 1

    This was found at an unknown location and is in the possession of David Longson. Bonnybridge Silica &

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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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  • 8 Calder

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

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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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  • Calder 6527

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

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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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  • Calder 3

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

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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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  • Bonnybridge FCC

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

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