I recently purchased this beauty which I believe is from the 1920s but thats about the limit of what I know or can find out. Would love to have the input from some of you that know to expand on this a bit more.

Also, I attempted to have it repaired but my repairer was unable to get his hands on the correct sized hairspring for the 13LB calibre movement. Does anyone have an idea where I can source the part on either the internet or somewhere here in Australia?

Thanks in advance