I was sure one of my injectors was E type and the other was G type. I got both off B/S/T's and both were classified as E's. But as was stated in this thread I found info that said if the handle had a seam in it it was a G type. Now after seeing this I'm confused some because my heads look identical and both have the one patent# 1806087 but one is the darker bakelite handled E and I assume the lighter in color and plastic handle with the seam is a G. The only thing I'm sure of is they are great little razors and I enjoy my shaves from them.