Found by Ian Suddaby on the site of the old Bonnyside Brickworks, Bonnybridge.
This example is not in my possession.
Unidentified maker.
This may possibly have been manufactured by James Dougall for the Coppee Coke Co. A similar firebrick was, however, found at the Heathfield Fire Clay Works and therefore Heathfield could be the manufacturer? – click me
1870 Company founded.
1910 Private company.
1961 Coke oven builders and mechanical constructors.
The Coppee oven, with vertical flues in the oven walls, these ovens being built narrow, long and high. By 1861 the Coppee coke oven of Belgian invention was in use on the Continent, and in 1873-74 it was introduced into England. It had vertical flues and was of the non-recovery type.
James Dougall & Sons Ltd, Bonnybridge, Stirlingshire.