I think the Old Bruyere stamping can be a tough one. I'm assuming the marking was all made with one stamp. Serifs but no apostrophe... The COM looks like the stamping used on Comoy's Sandblasts. Note also what appears to be the "skinny" C... So dating the pipe...don't no. Does it have the metal reinforced tenon? Cracks in the C, very common. Whatever the date it was a well used pipe!