• Bonnybridge 33

    Found by Martyn Fretwell in Corris, Wales. I am not in possession of this example. Bonnybridge Silica

    Read more
  • Bonnybridge 1915

    Found by Gordon Wyle at Bonnybridge. Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder

    Read more
  • 12 Calder

    Found at Kilwinning, Ayrshire Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick

    Read more
  • Calder XL

    Found near Kirkcaldy, Fife Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick

    Read more
  • Bonnybridge 3542

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

    Read more
  • Octo –

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

    Read more
  • Bonnybridge FCC

    Found at Drum Farm, Bonnybridge. Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

    Read more
  • Calder L U9

    Found Drum Farm, Bonnybridge Calder Firebrick Works, Airdrie, Lanarkshire. Bonnybridge Silica & Fireclay

    Read more
  • Bonnybridge

    Found at Drum Farm, Bonnybridge Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

    Read more
  • Bonnybridge 45

    Found Bonnybridge Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire. . . . .

    Read more
  • Bonnybridge

    Found Drum Farm, Bonnybridge Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

    Read more
  • Bonnybridge

    Found Drum Farm, Bonnybridge Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

    Read more
  • Calder L 22

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

    Read more
  • Bonnybridge

    Found Drum Farm, Bonnybridge Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

    Read more
  • Bonnybridge

    Found at Drum Farm, Bonnybridge, Falkirk Because of the shape of the frog,  this has more the appearance of

    Read more
  • Calder _

    Found Dalmellington This brick is crudely tapered. Note the thumb print to top right. Bonnybridge Silica

    Read more
  • Bonnybridge 14

    Found Barrhead, Glasgow. Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire. .

    Read more
  • Octo D764

    Found Firth of Clyde, Port Glasgow Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder

    Read more
  • Octo BL Supra

    Found Drum Farm, Bonnybridge OCTO BL Supra ( Bloating Ladle) Bonnybridge Silica & Fireclay Co Ltd,

    Read more
  • Bonnybridge 24A

    Found at Drum Farm, Bonnybridge. Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

    Read more
  • Calder 2825

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

    Read more
  • Bonnybridge 43

    Found Drum Farm, Bonnybridge Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

    Read more
  • Bonnybridge 25

    Found Drum Farm, Bonnybridge Bonnybridge Silica & Fireclay Brickworks, Bonnybridge, Stirlingshire.

    Read more
  • Calder 19S

    Found by Aimee Surprenant in a house built in 1875  in St. John’s NL, Canada. This example is

    Read more
  • Carnbroe

    Kindly donated by Justin Parkes No lacy ‘C’ on this brickmark – the brick composition

    Read more
  • Octo

    Found Barrhead, Glasgow Bonnybridge Silica & Fireclay Co Ltd, Bonnybridge. alt Calder Firebrick Works,

    Read more