Quote Originally Posted by 18 Wheeler View Post
Here's my guess.

F= Featherweight.

The Superlights are models in their own right within the 400/410 range. Here's the page from BAR.

Two models. Deluxe with what looks like the stocks made from Poplar, and classic. I wouldn't be upset if my stock was in Walnut.
But isn't a big part of having a superlite having the specific stock that comes with it ?