Found at Stein Manuel Works, Whitecross.

Harry Baird used to work at the Manuel Works, Linlithgow. Its somewhat confusing but a particular brick with say 50% alumina content may have an international code  and also a specific code as per the individual manufacturer. He gives the following as examples of brickmarks and what they could mean

RO – code for a specific design or customer. His recollection is that RO stands for the customer in this example and he recalls it may be The Gary Works, a major steel mill in Gary, Indiana, on the shore of Lake Michigan – WIKI

XX –  signifies an International standard for Alumina content

144 – Code for where the brick fits into the design / structure plan  in question

ND – Nettle Dense

  • 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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