Found Lochdrum Farm, High Bonnybridge ( very close to the Clayknowes Brick Works, Bonnybridge)
Clayknowes Brickworks, Greenhill, Bonnybridge.
This version has letters with serifs.
I wonder why they makers dropped the ‘K’ and the ‘E’ when stamping the bricks?
Note the thumb print to bottom left.
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Below – Similar stamp on a glazed brick found at the same location.

Below – Similar stamp on a wedge shaped brick found at the same location. Note the thumb print to top right.

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Note – is there any connection between Clayknowes brick works, Bonnybridge and Clayknowes Pottery and Brickworks, Gallowgate, Glasgow