Picked up this 1979 Nishiki Olympic 12 speed last Sunday for $160.
Serial Number: KI 14447
Suntour VXS rear derailleur - had to replace (temporarily) w/Falcon Index System.
Suntour VX front derailleur
Araya 27x1 1/4 wheels
Suze front & rear quick release hubs
Sakae "Custom Road Champion" handlebars
Sugino crank
Dia-Compe center pull brakes
The tires were shot, the rear derailleur bent some and wheels needed a little truing. She was all original before I put on the Speedplay alloy pedals and the cheap rear derailleur. I do plan on getting a VXS as an original replacement. It rides great and thus far I'm extremely pleased after one week and 140 miles. I plan on putting many, many more miles on this beautiful ol' bike.
If anyone could add to my knowledge regarding this bike, or if you believe I've got anything wrong; please let me know.