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Citizen chronograph calibre 8110A


Here are a few pictures of the gorgeous in-house movement Citizen cal 8110A that my friend Sergio was kind enough to let me use on the site so all of us could enjoy! Thank you Sergio!

The movement here is the Citizen automatic, 23 jewels, calibre 8110A with hand winding capability. It was produced by Citizen starting from 1972. It is a vertical clutch chronograph (beating at 28.800 bph) with column wheel and fly back function. (how many modern chronograph do that, and what is their cost?) Lets don’t forget it has a day and date indicator. The fly back function means that you can reset the chronograph while in motion and it will start again without needing to go the entire process of pressing stop-reset-start. So, one push can do all of this. Of course that if you want to stop it you can go the classic stop-reset way. A particularity for this movement is that when you want to change the day you should pull the crown to second position (for changing the date) and push and release the reset (1 o’clock) button. It is 27 mm wide and 6.9mm high. The column wheel/vertical clutch design of the movement advices to leave the chronograph running for most of the time (this way you can also see the beautiful sweeping central second hand in movement), but from time to time it should be stopped. This is a chronograph that needs to be used. It is not made for design purpose but for timing.

citizen 8110a chronograph

Citizen 8110A

Features
automatic chronograph, 60s, 30min, 12h, pillar wheel
flyback feature: reset and immediate restart
day: set by reset-pusher in crown position for date setting, 2 languages
date: quickset

Data
12”’, Dm= 27.0mm
H= 6.9mm
23 jewels
f = 28800 A/h
power reserve 40h

Stem Citizen 065-178

Remarks
1970-
ball-bearing rotor
usually as bull head (crown/puschers at 12h, day/date at 6h)

Example, year: signature; shock device
1977: Citizen Japan, 23 J.; Parashock

Data about this movement from here.

Read more about one of my favorite Citizen, one powered by this awesome movement here: https://vintagecitizenwatches.com/2013/12/24/citizen-bullhead-chronograph-67-9356/

9 thoughts on “Citizen chronograph calibre 8110A”

  1. Pingback: Citizen “bullhead” Chronograph 67-9356 | Vintage Citizen Watches

  2. Pingback: Vintage Citizen Chronographs | Vintage Citizen Watches

  3. I have this watch but with missing hands and hairspring. I could attach pictures of it if you can share your email-id. I would like to know if there is a chance to get it repaired or sell it.

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  4. I just got one of these to go with my Seiko Bullhead ! and thanks for your site as I thought the day wheel was not functional and, Voila ! now I can read the date in Kanji ! Thanks again….

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  5. The 8110A (normal case) was my first chronograph, bought around 1977 as a youngster. Relative to the market back then the 298DM (Germany) were cheap. It took decades before I realized just what a marvel of Japanese engineering this movement really is. Today I own about 120 wristwatches, including several chronos like 7750, 7751, 31679, ST1901/1908, but NONE are as fascinating as this 8110A.
    So much thoughtfulness and cleverness went into this feature ladden calibre: automatic. 28.8kbph, bilingual calendar, vertical clutch 12hr chrono with real flyback (!) function – who offers such a functionality today? And at what price level??
    Its accuracy was mind boggling from day one: I do remember that I could keep it ON THE SECOND over several weeks, when wearing the watch in a regular way during the day in school, placing it vertically at night on my nightstand.
    My Citizen was never opened since then. And whenever I grab it for a few days it surprises me with the same accuracy it had decades ago: on the tester I still see +/-2sec/day,. not even my Swiss ETA 7751 can reach this level..
    The non-bullhead version also offered the ONLY reasonable timer ring: it was scaled logically, i.e. BACKWARDS, can be rotated by a separate crown.
    One would set it to e.g. “45”min and see the remaining parking meter time perfectly. Why on Earth do all these modern watches have the useless and stupid FORWARD scales on their BACKWARD rotating timer bezels?
    Over the years I bought several more Citizen watches, usually their pilot quartz and solar models, yet the 8110A will never lose its pole position.
    Thanks for showing the innards of this incredible watch movement!
    Whoever designed it, against the typical standards: chapeau!

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