I see how you have came to this conclusion, the tricolor 6400 RD was the "newest" part on the bike. I had to change the brake levers (non aero) to ST-6400 shifters as the original ruber had gone and ruined them.
A beautiful 1980's Chromoly Simplon Spezial. All original era Shimano 600 components in excellent condition.
Fully chromed frame under the paint.
Size 54cm
Custom build and paintjob - Pearl white and metallic black two tone
Size 59cm,
Sturmey-Archer hubs and Crankset.
BLB handlebars.
Original 80's Turbo Saddle (not the modern remake)
open to offers