I have an older plane and would like to know the manufacturer. I tried google but am not getting good results.
The base is 2 1/2" x ~9 3/4 rounded in the front and an ogee in the back. The black handle and knob are plastic or maybe bakelite. Around the knob is cast "USA No 4", nothing else that I can see.
It looks very similar to this:
Cast into the lever cap is "SoJo", this is throwing me of on the google search because "SoJo" alone generates over 1mil hits.
Any help would be appreciated.