Double quantième flyback, chronographe bullhead à 28 800 Alt/h.
Vintage collector’s watch — Citizen Challenge Timer “Bullhead” bi-compax with black dial and silver subdials from 1979. This model features an unusual case shape known as “Bullhead,” which was very fashionable in the seventies. With its mid-size case suitable for all wrist types, this Citizen 8110 with a 1979 flyback automatic movement was associated at launch with the Triumph Bonneville Special Vertical Twin and featured in period advertisements.
The movement is a high-quality 23-jewel Citizen mechanical calibre with automatic winding, based on the column wheel chronograph movement C-8110. It includes a flyback function, also called “retour en vol.” With a 48-hour power reserve and a frequency of 28,800 vibrations per hour, it rivals the finest calibres from top-tier manufacturers. Designed with sport in mind, Citizen promoted this model heavily within the motorsports world at the time. In the late ’70s, it was frequently seen on the wrists of bikers, fashion models, and pop stars.
Still quite affordable today, this collector’s watch is becoming increasingly rare on the vintage market. This is partly due to the ongoing vintage revival, but also because its advanced mechanical functions include a double date display, a robust chronograph feature comparable to much pricier models, and a unique look that fits any wrist. Moreover, its personality changes entirely depending on the strap: it appears refined and even studious on a black leather or alligator strap, space-age inspired with a steel bracelet, and rebellious with a "pilot" or cuff-style strap.
You’ll find stories and anecdotal details about watchmaking brands and their most iconic models in our "Watch History" section.
The seller expressly declares to be the sole legitimate owner of the watch subject to this sale and certifies that it is free from any lien, seizure, or other restriction that could affect its full ownership or use.
They also guarantee that the watch is not the result of any fraudulent or unlawful activity.
The seller agrees to provide, at the time of the transaction:
All original documents required (purchase invoice or original certificate of ownership) proving the legal origin and exclusive ownership of the watch.
All original documents verifying their identity and current address on the day of the sale (national ID card or passport), along with proof of residence (e.g., utility or phone bill).
In the event of a false declaration, the seller acknowledges that they may face legal action in accordance with Articles 441-1 and following of the French Penal Code concerning forgery and the use of forgeries, as well as civil liability.
Finally, the seller confirms that all information provided regarding the condition and functioning of the watch is accurate and truthful as of the date of the sale.
