Citizen Chrono Master AUD5 2910-Y GN

The Master

Citizen logo

Citizen Chrono Master Chronometer Auto DateRef. AUD5 2910-Y GN

The Chrono Master series stands as one of Citizen's most iconic high-end watches, enduring from 1967 to the present day.

Quick facts

Citizen website

Brand: Citizen
Model: Chrono Master Chronometer
Reference: AUD5 2910-Y GN
Year: 1969
Case: Stainless steel, 36mm
Caliber: Citizen 5440, automatic

What about it

The Chrono Master is distinguished by the name itself on the upper part of the dial, an applied stylized eagle emblem at the 6 o'clock position and the same motif in a gold medallion applied to the centre of the case back.

The Chrono Master is a high-end watch that first appeared in Citizen's line-up in 1967. Although it was not the first of Citizen's watches to include chronometer grade movements, since it was preceded by the hand wound Chronometer' (1962), it featured a range of models in both hand-wind and automatic forms, and has probably become Citizen's most recognised high grade vintage watch, especially since modern versions have also been produced. Although there are other high end lines by Citizen, including the Chronometer and models in the Leopard line-up, the Chrono Master is probably the best known.

Citizen launched all bar one of their automatic versions of the Chrono Master in 1967, the same year as their first hand-winding model, and were produced until 1972. The movement is essentially the same for each version, in either 33 or 35 jewel form, but with extra adjustment to justify Chronometer, Special and Superior Chronometer Special grades. The two Special (35 jewel) movements also have fine adjusters on the balance.

The movements are part of Citizen's 52xx/54xx family, which can be found in a range of their other models, for example the relatively well known Crystal Seven and the Seven Star lines, and the lesser known Crystal Date, Cutlass and Dandy Seven models. The 52xx line features both day and date windows, the 54xx line is date only. The Chrono Master movements are the 5240 and 5440 with 33 jewels, and the 5250 and 5450 with 35 jewels. No automatic Chrono Master model was made without date or date/day complications.

As with its hand-winding namesake, all but one version of the automatic Chrono Master models, which are all cased in stainless steel, feature a gold medallion on the case back. There were no gold plated or gold-filled Chrono Masters, only the solid gold versions of the hand winding model.


Diameter icon



Lug width icon


Lug widthmm

Frequency icon



Power reserve icon


Power h

Crystal icon



Citizen Chrono Master Chronometer case


The standard Chrono Master's accuracy when it was launched in August 1967 was -5 to +10 seconds per day. I have not found performance certificates for any of the Citizen Chrono Masters, but here is one for their 1962 Chronometer model (I would imagine that the same standards would be applied to the Chrono Master chronometers). I believe these correspond closely to the COSC standards at that time.

The movements run at 18,000 beats per hour (5 beats per second), and measure 28.00mm across, and are 3.98mm deep (date only) or 4.38mm (day and date). They feature 'second setting' or 'hacking', i.e. the movement is stopped when the crown is pulled out to the time-setting position, to allow accurate synchronisation.

Citizen Chrono Master Chronometer
Citizen Chrono Master Chronometer dial Citizen Chrono Master Chronometer Citizen Chrono Master Chronometer dial Citizen Chrono Master Chronometer movement


Availability: very rare
Few available

Pricing: 1,000+ €
(Dec 2023)



Only few words written about Chronometer! Come on, guys!

VCW article


Some recommended strap options for this watch. External links to their webshops.