No 4619 Mullite F

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Found at the Manuel Works, Whitecross

  • Stein, Castlecary Fireclay Works, Castlecary, Stirlingshire.
  • Stein, Manuel Firebrick and Refractory Works, Whitecross, Stirlingshire.
  • Stein & Co, Anchor Brickworks, Denny, Stirlingshire.
  • Milnquarter Fireclay & Gannister Works, Bonnybridge, Stirlingshire.

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Below – Gordon Wyle found a similar special at the Manuel Works and has interpreted the numbers as No 4579 Mullite F, so my example could possibly bear this mark too as its not too clear.

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