The way I tell if a Gillette is a Ranger tech is first they have to be nickel plated otherwise your looking at probably a Milord. There will be a smooth band on the handle right above the TTO knob. See Picture. The 41 Ranger did not have end caps and had "PAT. NOS. ON PKG." stamped on the smooth band. 46 Ranger did have end caps but did not have anything stamped on the smooth band.
41 Ranger Tech
47 SS
I'm sure I probably got one of the points wrong If so I will be corrected shortly.