Down-tube friction levers, Shimano SIS indexed down-tube levers (from Dura-Ace 7400 in 1984), SunTour's Power Ratchet friction levers, and Campagnolo's Ergopower brake-shift levers (first catalogued in 1992). Indexed shifters only work with derailleurs and cogs of the same family and speed count.
4 references tracked.

Campagnolo Nuovo Record
ShifterCampagnolo· ref 1014 (clamp-on); 1013/5 and 1013/6 (braze-on)
$60–$130 typical ask
118 on eBay

Shimano Dura-Ace 7400
ShifterShimano· ref Dura-Ace 7400 SIS down-tube levers (6-, 7- or 8-speed)
$80–$200 typical ask
27 on eBay

SunTour · Power Ratchet (ratcheting friction levers)
ShifterSunTour· ref Power Ratchet (ratcheting friction levers)
$25–$40 typical ask
58 on eBay

Campagnolo Chorus 8-speed
ShifterCampagnolo· ref 8-speed Ergopower, 1992–1997 type
$120–$270 typical ask
86 on eBay