Citizen Caliber G900 Watch Movement

Manufacturer	Citizen Watch Co.
Caliber Number	G900, G900M
Movement Type	Quartz, solar-powered
Diameter	Unconfirmed
Height	Unconfirmed
Jewel Count	0 (no jewels)
Capacitor	Citizen part number 295-69 aka 295-6900
Power Reserve	~9 months on a full charge
Accuracy Rating	+/- 15 seconds per month (average)
Hand Count	7
Functions	Central hours; central minutes; small seconds subdial at 3:00; central pointer date hand (also used to indicate the mode the watch is in); GMT subdial at 7:00 (the hands also function as alarm hour and minute hands, year indicator (hour hand), month indicator (minute hand) depending on the mode); retrograde AM/PM indicator between 4:00 and 5:00; minute repeater function (electronic chiming sound to indicate the time)
Hacking Seconds?	Yes
Country of Origin	Made in Japan
Known Models	Citizen Eco-Drive Minute Repeater (Ref: BL9000-59F) (Add your watch to the comments below…)

The Citizen caliber G900 is a solar-powered perpetual calendar watch movement with a minute repeater function. This caliber is part of the G90* family of movements.

This movement was found in a Citizen Eco-Drive watch with “Calibre 9000” on the caseback.

Some of the topics covered in this caliber listing:

G900 Solar Charging Times:

G900 top cover plate removed:

If you need to replace the capacitor (aka secondary battery) in your G900 powered timepiece, you will need to remove the top metal cover from the movement.

Below is what the main movement looks like without the cover installed:

G900 Capacitor Replacement:

Once the top cover is off, the capacitor is simply held in with a friction arm. Gently use your tool to remove the cell from the movement.

On the example watch shown, you can see that the original energy cell is a Li-ion CTL920 battery with Sony branding, made in Japan. CTL920 or MT920 are the capacitor type, but you can’t use just any CTL920 or MT920 – you have to use the correct part number due to the tab position being oriented specifically for this movement.

The Citizen part number for the G900 replacement capacitor is 295-6900 aka 295-69. You can order it here.

Reset After New Capacitor:

Citzen makes it clear that they want G900 owners to send their watches back to the factory for capacitor replacement…

“Although the secondary battery is not required to be replaced as a general rule, there may rarely be times when the secondary battery does not charge properly. If a problem should happen to occur, promptly have the secondary battery replaced by an authorized service center.” -Source: Official G90X user manual (page 31)

However, unlike most other watch companies, they are also willing to provide information for what do in case you DIY – although it is sort of a game of page jumping in the manual:

“After the secondary battery has been replaced, perform the “All-Reset” and “Setting the Reference Position” procedures by referring to “4. Setting the Reference Position”. The watch may not operate properly unless these procedures are performed.” -Source: Official G90X user manual (page 33)

Video: G900 watch setting instructions

Additional Resources:

Official Citizen instruction manual (pdf)

Note: This caliber listing is still being updated, but feel free to start discussions on it in the comments below…

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Gene Long

4 months ago

Can we listen to the minute repeater chimes?

Emory T.

Hi, it there a jump start or AC reset that I need to do if I installed a new capacitor? I installed a new one and it isn’t doing anything. Thank you for any help you can provide.

24 days ago

Citizen UK refused to service mine. Point blank refused and were rude about it. Fixyourwatch had a look at it but sent it back saying they couldn’t fix it. Really annoying it it’s just stuck in low power mode so surely just needs a new capacitor.