Have found another button maker! Rider and Bell is a light engineering firm established in 1920. It is now located in Peakhurst, but in the 1940-50’s was in Rhodes, Sydney. The Library of NSW has some photos of the manufacture of fireman’s brass helmets at Rider and Bell in 1958, which is nice as I now have a bunch of Fire Brigade buttons.
Here is a new Beauclaire card:
This photo was originally in a Victorian Button Collector’s magazine; what a wonderful buckle and button set!