Found by Ian Suddaby at the old Heathfield Fireclay Works site.
I am not in possession of this example.
Unidentified maker.
Possibly have been manufactured by Heathfield Fire Clay Works for the Coppee Coke Co (however a similar firebrick was found at the James Dougall Fire Clay Works at Bonnybridge and therefore Dougall could be the manufacturer?) – click me
Heathfield Fireclay Works, Garnkirk.
James Dougall & Sons Ltd, Bonnybridge, Stirlingshire.
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.
Evence Coppee (1851-1925) was the son of Evence Dieudonne Coppee, the inventor of the closed retort coke oven, which in and about 1850 inaugurated a revolution in the coke industry.

Below – E Coppee brick alongside a Heathfield brick also found at the same location. The fabric and colour of the bricks are strikingly similar.
