oldlock wrote
As to brand, no idea - probably made for one of the big hardware merchants of the time.
Typical 1920’s-1930’s builders’ hardware; like Oldlock, I have no idea of maker but common on pre-WW2 housing. Some of them originally had Bakelite furniture, or antique copper bronze, (as had my parents house) which are collectable retro themselves, for period restorations. They might even be pre-WW1, as designs had a long life until 1939. Post-WW2, builders stopped bothering with internal locks. My childhood’s 1938 home had better internal doors than postwar exterior ones. By now, many pre-war doors have been replaced with cheap flush doors etc. with equally cheap latches; Barry Bucknall’s 1960’s ‘modernising ’ diy idea.
[unknown]