[MENTION=554117]Oldsteeler[/MENTION]

The fame tubing decal is the Double Butted Chrome Molybdenum. An example can be found here:

1980 Nishik International

An example of the seat tube decal can be found here:

1979 Nishiki Olympic 12

I think you are correct about the decals being 1979 Nishiki USA.

The serial number is for Nishiki Canada. But I have never seen a Canadian Nishiki with these decals.

The 1979 Canadian Nishiki International had the same tubing decal, but different seat stay caps.

Very strange Nishiki bicycle indeed.