Era
Swiss brands moved from radium to tritium lume, and Omega's six-digit references arrived in 1962. The Speedmaster 105.012 was one of the two references worn on the Moon, IWC launched the Aquatimer in 1967, and the cam-switched caliber 861 replaced the 321 in 1968. Zenith unveiled the El Primero in January 1969.
17 references we cover.

Omega · Speedmaster
Chronographref 145.022
$4,975–$6,875 typical ask
202 on eBay

Omega · Speedmaster
Chronographref 105.012
$11,425–$19,100 typical ask
17 on eBay

Omega · Seamaster 300
Diveref 165.024
$7,525–$12,675 typical ask
23 on eBay

Omega · Constellation
Dressref 168.005
$2,500–$3,275 typical ask
135 on eBay

Omega · Seamaster De Ville
Dressref 166.020
$1,025–$2,500 typical ask
127 on eBay

Longines · Ultra-Chron
Dressref Ultra-Chron
$675–$1,625 typical ask
172 on eBay

Longines · Admiral
Dressref Admiral 5 Star
$500–$1,000 typical ask
93 on eBay

IWC Schaffhausen · Yacht Club
Dressref 811
$2,200–$3,075 typical ask
55 on eBay

IWC Schaffhausen · Aquatimer
Diveref 812 / 812 AD / 1812
$10,200–$14,675 typical ask
2 on eBay

Tissot · PR 516
Diveref PR 516 (refs. 44544, 44622)
$260–$370 typical ask
52 on eBay

Tissot · Sideral
Diveref Sideral / Sideral S
$270–$525 typical ask
49 on eBay

Movado · Datron
Chronographref Datron HS 360
$5,100–$6,925 typical ask
15 on eBay

Movado · M95 chronograph
Chronographref M95
$6,475–$9,425 typical ask
4 on eBay

Movado · Kingmatic
Dressref Kingmatic Sub Sea
$470–$2,425 typical ask
83 on eBay

Zenith · El Primero
Chronographref A386
$18,850–$21,025 typical ask
4 on eBay

Zenith · Defy
Diveref A3642
$1,675–$3,700 typical ask
25 on eBay

Zenith · Cairelli
Chronographref Cronometro Tipo CP-2
$14,575–$18,200 typical ask
2 on eBay