I know this belongs over at Badger & Blade but I don't use DE razors and sort of feel like a traitor just joining a DE site.

I picked my step dad up a Gillette Toggle DE for $3.95 not too long ago with a D4 date code.

I have sold a few DE razors and knew the code was from the 50s but didn't think anything of it until a couple of days ago.
http://www.geocities.com/safetyrazors/gil_ser2.htm#1950

They list 60, which is what I knew about toggles, as the only year.

I am quite sure it says D4.

I know that toggles are VERY collectible but what do you think of this?

OBTW, it's perfect.