I received two Probak blades in a blade case that came along with an Old Type I bought. The blades were stuck together and when I pried them apart
I found spots on each corner, foreground blade. I rubbed off the upper right corner trying to figure out what it was and to see if it seemed
similar to the glue/wax that is on Russian blades. It seemed very similiar.
From what I read, Probak was aligned with Gillette and then started his own company in the 1920's and 30's I believe.
Any blade historians around?

I found spots on each corner, foreground blade. I rubbed off the upper right corner trying to figure out what it was and to see if it seemed
similar to the glue/wax that is on Russian blades. It seemed very similiar.
From what I read, Probak was aligned with Gillette and then started his own company in the 1920's and 30's I believe.
Any blade historians around?
