Looking for information: Susquehanna Buck recurve

[Bones92]

I have a recurve that is made of a wood riser that seems to be two types of hardwood joined togetherwith forest-green back and face laminate.  

It is marked on the lower face: SUSQUEHANNA BUCK with an Indian and two crossed hatchets.

The riser is marked by hand:

A473
SQ45
52"
S.L. 48"

I'm guessing 52" is the bow length, and it should take a 48" string length.  

It's a very nice, light recurve.  I was just curious if anyone knows of this maker, and when it might have been made.

Thanks!

[Bones92]

All, am I at least right that SQ45 indicates a 45-pound pull?