BALL Caliber RR1206-C

Brand	Ball Watch Company
Caliber Number	RR1206-C, RR1206C
In-House?	No
Exclusive?	Yes
Base Caliber	Sellita SWXX with custom modules
Movement Type	Automatic, self-winding mechanical
Lignes	11.5”’
Diameter	26mm
Height	Unconfirmed
Jewel Count	26 jewels
Beat Rate / Frequency	28,800 bph / 4 Hz
Lift Angle	Unconfirmed
Power Reserve	~38 hours
Hand-Windable?	Yes
Anti-Shock Device	Incabloc
Regulator	Etachron
Hand Count	4
Functions	Central hours; central minutes; central sweeping seconds; central 24 hour GMT hand; double moonphase indicator at 6:00; day/date at 3:00
Hacking Seconds?	Yes
Country of Manufacture	Swiss made in La Chaux-de-Fonds, Switzerland
Known Models	Ball Roadmaster Marine GMT Moon Phase (Ref: DG3220A-S2C-BK, DG3220A-S2C-GR, DG3220A-S1CJ-SL, DG3220A-S1CJ-BE, DG3220A-S1CJ-BK), Roadmaster Marine GMT Moon Phase Meteorite (Ref: DG3220A-S2C-MSL) (Add your watch to the comments below…)

The Ball caliber RR1206-C is an automatic GMT movement with a moonphase indicator. Watches with this movement were introduced in December 2023.

Ball markets models with the RR1206-C as being the world’s first day-date GMT watches.

The -C on the calibre number indicates that this movement is chronometer spec and certified by COSC.

GMT Quick Set:

Cal. RR1206-C powered watches have two extra crowns on the left side of the case. The crowns unscrew to reveal patented quick-set GMT pushers, used to set the central GMT hand.

The top button (10:00) advances the hand forwards; the bottom button (8:00) moves the hand backwards.

Each press of the button moves the hand one hour. See video below…

Double Moonphase Indicator:

As a double moonphase indicator, the phases of the moon are shown for the Northern and Southern Hemispheres.

Ball refers to this complication as a “specially developed movement module” and goes on to say this:

“Crafted and fine-tuned by our watchmakers in La Chaux-de-Fonds, Switzerland, the complication’s precision accurately reveals the time required for the moon to return to its original position in relationship to the sun and the Earth – approximately 29.5 days. For explorers around the world, we’re putting the spotlight on our natural fascination for astronomy.” –Source

The adjust the phase of the moon, press the indented pusher on the crown side of the case.

Caliber Commentary:

Although Ball has an image of the RR1206-C on this page, they are not very forthcoming with regards to technical information.

Furthermore, at the time of this post (2/25), Ball does not have the RR1206 listed on their mechanical movements page here. However, it is listed on their Roadmaster Marine GMT Moon Phase Meteorite product page here.

Their product pages offer no movement images or other details such as base caliber, jewel count, power reserve, etc. The closest you can get to seeing what the movement possibly looks like, is on this landing page for the Roadmaster Marine GMT Moon Phase.

It’s unbelievable that in this day and age, in a watch world where Caliber Corner exists, watch enthusiasts are still willing to buy a $4,099 USD watch without even knowing the power reserve and other pertinent information about the movement.

(Note that the image at the top of this page appears to be for the non-moonphase version based on the reference number, even though it is the image used on the Roadmaster Marine GMT Moon Phase landing page linked above.)

Video:

Additional Resources:

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