ETA Caliber 2484

Manufacturer	ETA
Caliber Number	2484
Movement Type	Automatic, self-winding mechanical, lever style
Lignes	11.5”’
Diameter	25.6mm
Height	5.3mm
Jewel Count	25
Beat Rate	18,000 bph
Lift Angle	52 degrees
Power Reserve	42 hours
Rotor Winding Direction	Bi-directional
Hand-Windable?	Yes
Anti-Shock Device	Kif
Hand Count	3
Functions	Central hours; central minutes; central sweeping seconds; date at 3:00
Quickset Date?	No
Country of Manufacture	Switzerland, Swiss made
Known Models	Tudor Prince Oysterdate, Tudor prince Oysterdate Submariner 7021 (Add your watch to the comments below…)

ETA caliber 2484 is a vintage automatic watch movement found in various Tudor watches from circa 1950s ~ 1960s.

This caliber seems to be based on the ETA 2452.

It appears that the 2484 ebauche was provided exclusively to Tudor by ETA, almost like a modern-day manufacture movement. If you know of other brands using the 2484 (not counting franken watches and rebuilds), please comment below.

For the reason above, sometimes you may see this movement referred to as Tudor caliber 2484.

In Tudor’s own words:

“The movement of reference 7021 was the self-winding ETA Calibre 2484 with a date disc, polished decorations and circular Côtes de Genève finishings. Its bracelet was the Oyster-type reference 7836 with folding links and the Rolex signature.” –Source: Tudor history Divers’ watches: From 1969 to 1999

Calendar Setting:

The 2484 is not equipped with a quickset date mechanism. Therefore, in order to advance the date without having to advance the time a full 24 hours per day, simply turn the crown from 8:00PM to past 12:00AM, back to 8:00PM, then past 12:00AM and so on, until you reach your desired date.

Video:

Additional Resources:

• More Tudor watch movements