Watch type
Slim watches built to sit under a shirt cuff, read by their indices and hands more than by lume. Longines launched the Conquest in 1954 and followed it with the Flagship and the Admiral. IWC's Ingenieur 666 looks like a plain dress watch but hides a soft-iron inner case that shields the movement from magnetism.
16 references we cover.

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

Omega · Genève
Dressref 135.070
$525–$975 typical ask
88 on eBay

Longines · Conquest
Dressref 90xx series
$675–$3,000 typical ask
50 on eBay

Longines · Flagship
Dressref Flagship
$500–$1,825 typical ask
57 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 · Ingenieur
Dressref 666A / 666AD
$3,525–$5,050 typical ask
23 on eBay

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

IWC Schaffhausen · Portugieser
Dressref 325
$18,000–$18,025 typical ask
1 on eBay

Tissot · Visodate
Dressref Visodate Seastar
$240–$390 typical ask
150 on eBay

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

Movado · Triple calendar
Dressref Calendograph, cal. 470/475
$1,400–$3,700 typical ask
87 on eBay

Movado · Tempomatic
Dressref Tempomatic
$600–$1,000 typical ask
14 on eBay

Zenith · Captain
Dressref Captain
$1,400–$2,450 typical ask
14 on eBay

Zenith · Port Royal
Dressref Port Royal (various)
$2,300–$3,325 typical ask
96 on eBay