Austin Height Finder Photo Interperter Type C-1 #31282 Advertising Displays

Description

This is a finder height photo interperter Type C-1 Specification #31282 manufactured by Advertising Displays Inc based in Covington KY USA.  There is a label that has the following information:
Order No 43-26005-AF
Part No HF-200
Serial No A2B5
Property of US Army Air Force.
The box container measures 7 1/2" x 5" x 2 1/2".  Included are two unopened sealed envelopes containing spare parts.
One has the following:
Part #        Nomenclature                    Qty
HF-121      SLIDE Y MOVEMENT       1
HF-120      SLIDE X MOVEMENT        1
HF-130      SCALE                                1
The other unopened envelope has
Part #         Nomenclature                      Qty
HF-108       SPRING LOCK ASSY            1
HF-135       MIRROR                                 1
HF-136       CLIP MIRROR                        1
HF-139       PIN TAKE UP                          1
HF-140       SPRING TAKE UP                  1
HF-145       SPRING X MOVEMENT          1
HF-148       SCREW 2-56 X 3/16 FLT HEAD
Since the spare part envelopes are sealed an unopened, I am unable to confirm what is inside.  These are sold as is condition.
My father got this back in the 1950's and has been sitting in my shop for the last 4+ decades (and not been used during that time)
Please see pictures for the condition.
I expect that this type of equipment is very hard to come by, particularly in such good condition