• Cardowan

    Found in Fife area – JC Cardowan Fire Clay Works, Stepps, Glasgow Large thumb print to top right

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  • Young’s

    Found in Renfrew on site of ex Renfield Mansion. Heathfield Fireclay Works, Heathfield, Lanarkshire.

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  • Youngs

    Found at Heathfield Fire Clay Works. Note the thumbprint to the top right. Heathfield Fireclay Works,

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  • Cardowan Patent

    Found in Fife area – JC. Cardowan Fire Clay Works, Stepps, Glasgow. Note the thumb print to top

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  • Young

    Found at Bo’ness, Firth of Forth Heathfield Fireclay Works, Heathfield, Lanarkshire. Alternative

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