Identifying light, reg, heavy Super Speeds??

[Rocketeer]

I am sure there is probably already a post for this, but 1950s era Gillette ads refer to three different grades of Super Speed razors. See an example here ...

http://www.youtube.com/watch?v=H-gmoyG2PT8

Is there any markings on the razors which identify whether they are light, regular or heavy??

 

[americanarmsdealer]

It's all in the flair tip. Blue for light, plain chrome for regular, and red for heavy.

 

[mr-razor]

this Ad shows all 3:

 

[Rocketeer]

Thanks! I was pretty sure it was something simple and figured I'd get a quick answer here. I wasn't sure whether the colors of the tips changed with different model years, or was the key to the aggressiveness.