From what I have learned, the first Super Speeds (47-49) were sold in a pasteboard case. The brown (two-toned) leatherette case was from the Ranger Tech, produced before the war in 1941. The Mr. Razor link posted above by Amishmotorboat shows that clearly.
The plastic case did not come about until 1950, and it exists in two versions, one with slots to fit the '51-'52 merchandise display. I seem to recall someone documenting this a few months ago . . . was it AsylumGuido?
I have seen (and bought a couple on eBay) 48-49 SS in that same Ranger Tech case. Having seen more cases than Ranger Techs, it makes one wonder if Gillette may have packaged some early SS with leftover RT cases? I presently have a nice case, just waiting for a lonely Ranger Tech to come along and fill it up . .
Brad - OGA
You must be willing to do the things today others won't do . . .
In order to have the things tomorrow others won't have. - Les Brown