Super Speed Date Code

[strohman]

I just received a very nice Super Speed Flair Tip with a date code of H4. Can someone help me identify the date? I'm totally new at this, but I'm thinking this might be from 1962, based on the others I have seen.

Let me know if you know the correct date for this razor.
Thanks!

 

[MrGuy]

I think this will help