Is it a #42 or a #43?

[treefarmer]

I can not find any information describing the differences in a Queen #42 or #43. Can it be handle material?
This little one came from TripleF(Scott), the handle material, Winterbottom bone matched one of my EDCs, a #49. Both are from the 1958-60 tang stamp. The small one has been well used but it has great walk and talk.
Treefarmer

It's a tiny little thing at 2 5/8".

1958-1960 stamps

1 back spring, blades are well used

[bdev]

Hi Treefarmer,
It's a 43. The 42 had amber composite handles.
Nice pick up. Looks like someone really liked carrying that knife.
Still has a lot of life left in it.

Bruno