Titanium components from Pino Morroni. I had his quick-release skewers on my Assenmacher late 70s. Interesting article here:
TheRetroGrouch - Pino
Also, Modolo had carbon fiber downtube shifter levers available in 1980. There was much confusion about these, many believing they were plastic (which technically I suppose they were) and would surely break. I used them for years with no problem although I never cared for the curved design.
Tied & soldered spokes were common.
Lightened shifters. These were mine. The other broke
