Rolex caliber 1055b

Rolex caliber 1055b
Brand:Rolex
Reference:1055b
Base: Rolex 1055
Movement:Automatic
Display:Analog
Diameter:28.50
Jewels:25
Frequency:18000
Date:Date, Day
Hands:Hours, Minutes, Seconds
Additionals:Chronometer

Description

Second generation Rolex Day-Date movement; altered 1055. 7.1mm high instead of 7mm. Introduced around 1957

All watches using this caliber: