Hi, I need help ID'ing a bike. I recently inherited my dad's pre-1974 American Eagle (Nishiki), since last year he sadly passed away. It is 100% original (except for rear tire and handlebar grips), however, sometime in the last 12 months, the front wheel/tire disappeared in my relative's posession. Unfortunate. So in addition to ID'ing the bike, I am also looking for guidance as to where to get an original front wheel and quick release.

Bike Description:
Serial #: KS87779
A "W" and PDS also stamped into the bottom of the frame.
Front gears: Suntour Sugino
Pedals: Kyokuto Pro Ace
Shifters: Suntour - Mounted on the downtube
Frame: American Eagle Front logo & Japan sticker and Chrome Molybdenum sticker & WDCSC stamp by rear wheel quick release
Rear quick release - Suntour
Brakes: Suntour Diacomp
Rear Hub: Sunshine 5345 0
Rear Wheel: Araya Lightalloy 27 x 1 1/4 w/o hp
Rear derailleur: Suntour GT
Seat: Fujita
Handlebar riser: Compe
Brake levers: Diacompe
Handlebars: KB Japan Champion
Front derailleur: Suntour Sport

One additional interesting feature is a large metal disc with holes in in behind the largest gear on the rear wheel.

Thanks and any help is appreciated.