T-Mar thanks for your write up on Nishiki serial numbers, given what you posted and with a serial number of KC 29584 I arrive at the following:

K= US market pre-1985.
C=1983 manufacture year.
29564=29564 frame produced in 1983 for the US market.

Now if anyone knows where I can find a 1983 Nishiki catalog?

VintageRide if you come across this post I saw the picture you posted of your brother's 85 Cresta in a different and earlier post and it's color and decals match mine, except for the missing down tube shifters and shift bracket for what I believe would be bar end shifters. Did they keep this paint/design from 83 through 85? Thanks