I just go started here and purchased my first razor, a Fatboy to get started. While I was waiting for it to arrive, my mom gave me another setup that had come from a friend of the family and it had these three blades with the razor.

I searched the forum and found a little about the Durex, but nothing on the Greenfield and AM-A-CO blades. Has anyone ever heard of these blades?

Is it safe to try out these really old blades?