I have one of those frame sets, also an '81, in the same colour scheme.

All mine had left was the Dura Ace BB and Kuwahara branded headset, though the frame itself and original paint are actually in great shape.

Whatever your resto plans, you'll want to hold on to those shift levers - the frame has Shimano 'B' type bosses, and will only fit DA/600/Golden Arrow from that era (other shifters don't fit the bosses without modification).

They're nice bikes, top of the line for Apollo in their time.

I found mine a bit flexy, but I'm 6'3" and over 250lbs…so that may have more to do with the rider than the frame characteristics. Currently partially disassembled in the basement, but I might build it up w/moustache bars and a single front ring soon...