Thanks Retropin

I've been looking at a lot of pics on the net, but none really show a good profile of the wooden rails.
The Bally Bingo ones appear as almost round, about 35mm dia with 90 degrees cut out (end profile like a big mouthed pacman). Sort of like the GTB ones if they continued around another 90 degrees on the outside edge.

This would allow them to cover the glass and go down the sides a bit. That would also explain the damaged sides, as removing the GTB profile would be unlikely to damage so far down the side.

Can anyone confirm the profile?

Brunswick Brawler, the guy was 6' tall, didn't look at his legs, dark skinned and black hair.