[Arran]

Someone had one of those, or the Canadian version, on one of the regional craigslist sites, it had not only the puckering, but a large hole torn in the grill cloth. My late uncle had a similar set that had what looked like a fan grill over the speaker, like a 9X561, I think it also had an 8'' speaker inside, part of what they called their "Golden Throat" series, I'm not sure but I think the set he had also had an RF amplifier stage, it sounded good as well. I think if Paul can find a non destructive way to remove the speaker board that may simplify replacing the cloth, but since I have never had one of these I can only speculate how it was constructed.
Regards
Arran