Just picked up this Nishiki Rally Sport Series 19" step through. From the serial number GD720123, it looks to be built by Giant in late February 1987, Nishiki 1207 tubing. Has Femco 27" steel wheels, Shimano front stem shifters and FD, Shimano Skylark RD, cheap looking Tracer cranks, Kun Yu hubs, Diamcomp side pull brakes, and cheap steel bars. Never seen Femco, Tracer, or KunYu before. Even the headset, BB, pedals and seat, are unbranded and feels like the bike shop was just throwing stuff on this bike, using the Nishiki name and frame to dump overstock parts. Not going to spill the LBS name because I really like them.

Still in near new condition for how old it is. Seller said his wife rode it a couple of times and hung it up in the garage. Score!
Photo from CL ad.