• Forth 3

    Found Carron Works, Falkirk. Roughcastle Firebrick Works, Bonnybridge, Stirlingshire. . . . .

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  • Forth 2

    Found at Roughcastle Firebrick Works, Bonnybridge. Roughcastle Firebrick Works, Bonnybridge, Stirlingshire.

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  • Forth A

    Found Cruden Bay, Aberdeenshire. Roughcastle Firebrick Works, Bonnybridge, Stirlingshire. . . . .

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  • Forth

    Found Old Niddrie brickworks, Cleikimin, Edinburgh. Roughcastle Firebrick Works, Bonnybridge, Stirlingshire.

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  • Forth

    Found on Bo’ness Firth of Forth. Roughcastle Firebrick Works, Bonnybridge, Stirlingshire. . . .

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