[MENTION=407088]Needles[/MENTION], thanks for posting more information.

In the early 1980s bicycles were being made with an aero design. Aero frames usually had oval tubes. This also helps to explain why there are no lugs.

The serial number format and "designed by NISHIKI" means that the frame was made by Kawamura of Japan, the same manufacturer of most of the early USA Nishikis. "G" serial numbers for Kawamura frames are not common in the USA and Canada. These frames were probably made for another foreign market.

The second letter, "E", in the serial number means that the frame was made in 1985.

Looks like a great bike to take on the road. Too bad about the "goatheads".