Needs a good WD-40 wipedown, then build or sell.
Haven't decided. Stamped "10-88" on the bb, so I'm assuming 1988.
Couldn't figure out the 105/600 tricolor mismatch.

The 600/Open 4CD wheels are later than the 105 2x6 group.

Either the group was OEM on a 1988 bike, which wasn't too cool, should have been 7, OR
the OEM group was 600 tricolor 2x7 and someone swapped in the 105 2x6, also not too cool.

If I build, it gets 8-sp wheel set, Sora STI's, saddle, black wrap and cables, 600 EX crankset, FD/RD. I keep the seat post, Technomic stem, look for some wider bars. Everything else goes to recover the $100 investment.

If I sell, frame and all goes out separately.