Citizen launched its vertical-clutch column wheel 8110 flyback automatic chronograph - like this just serviced example on offer here - in 1972 with a compact design, allowing for a smaller case. The 8110 tends to be lighter than, for example, the Seiko 6139 chronographs of the period, but just like the 6139 the 8110 featured nearly a dozen different variants.
Although the 8110 movement may have been Citizen’s answer to Seiko’s famed 6139 movement, the Citizen 8110 was superior in one manner – unlike the 6139, the 8110 features hand winding and a ‘flyback’ feature – which allows the wearer to zero the chronograph whilst it’s running, rather than having to stop it first, then restart. This permits an instant stop and re-start of the chronograph function.
All 8110 variants have the column wheel/vertical clutch design. These movements have quick setting mechanisms for date and day. Both are set when the crown is pulled out one position – the date by rotating the crown, the day by pressing the reset button. Compared to modern chronographs, the only chronographs in today’s market with similar features and construction sell at a far higher price point – such as Blancpain, Vacheron Constantine, Patek, and Audemars. The 8110’s are the least expensive, yet most sophisticated chronograph ever made!
This Citizen 8110 comes with a leather strap, nylon NATO strap, spring bar tool, and a Pelican travel case.
1970's Citizen 8110 Challenge Timer Chronograph
DIAL: Original dial with original minute, hour, and chronograph hands. This shimmering deep blue Citizen-signed dial is sharp, albeit with some wear at the very edges of the dial - and rather distinctly 1970's in its design and contrasting blue, orange, and white colors.
CASE: Stainless-steel Citizen 38mm x 44mm (with crown) case, with stainless-steel caseback. The case also features hooded lugs. The case unfortunately does not feature its original caseback, but rather one from its close relative, the 8110 Challenge Timer bullehad chronograph.
CRYSTAL: Citizen-correct crystal, scratch and blemish-free.
STRAP: This Citizen comes with a light brown leather strap, with cream-colored accent stitching, as well as a an 18mm dark blue and gray nylon NATO strap – a nice sporty complement to the 8110's classic vintage styling.
MOVEMENT: Original Citizen 23-jewel automatic movement - this watch received a full service in June 2020. The 8110 flyback tachymeter movement can be wound either manually or automatically. Separately, the date and day - with Spanish/English calendar variants – rotate and set as designed.
CROWN: Original Citizen-signed crown.
CHRONOGRAPH PUSHERS: Chronograph pushers depress with satisfying click, no stick. All chronograph hands return back and reset to zero with no issue.