I have a 1 inch firmer chisel made by "A Ridge&Sons" but it's the only one I've ever seen from this maker. The back of the chisel was very convex when I got it and it took some time to flatten it. Worth the effort though because the steel is excellent.
Thanks for those links, especially the second one.
Phil, and Evergreen,
As far as other ones out there, I've found a few. One was here, https://www.ukworkshop.co.uk/forums/a-few-chisels-t50624.html , others I found by Googling Alfred Ridge & Sons Sheffield. The one Steven had has been re-handled. None of this has any useful information that I could see, so I didn't bother to list them. But it's nice to see other examples.