Citizen is expanding its Challenge Timer “Tsuno” beyond Japan, bringing the 1970s “Bullhead” chronograph to Europe under reference AN3660-81A and onto US Amazon for the first time. The standard panda-dial Tsuno has been a Japan-domestic staple since 2021, but the new EU launch ships alongside a 4,000-piece luminous-green limited edition. Multiple color variants are also reaching American buyers through Amazon, all sharing the 38mm steel case with the crown at 12 o’clock and chronograph pushers at 11 and 1.
Price: From €229
Where to Buy: Google, Amazon (Darth Vader, R2-D2, Darth Maul)
The expansion lands almost seven years after Brad Pitt wore a vintage gold Citizen 8110 Bullhead as Cliff Booth in Quentin Tarantino’s Once Upon A Time In Hollywood. Interest in the model hasn’t faded since the 2019 film, and Citizen’s move fits a broader pattern of Japanese brands extending 1970s racing chronograph designs to collectors who’ve been locked out of vintage prices.
1. The “Tsuno” name comes straight from the 1970s bullhead
The Challenge Timer “Tsuno” revives Citizen’s early-1970s bullhead chronograph, named for the pair of “horns” that flank the crown at 12 o’clock. Citizen first put the modern quartz version back on the Japanese market in 2021, and carries the same case silhouette, orange chronograph hand accent, and panda dial proportions across to the EU and US releases. The horn layout itself traces back to top-mounted stopwatches, where pushers sat above the dial so timekeepers could trigger them with the same hand that held the watch.
2. The 38mm steel case holds vintage proportions
Citizen has kept the case at 38mm, matching the original 8110 generation rather than scaling up to modern norms. The crown sits at 12 o’clock with the chronograph pushers flanking it at 11 and 1, which is the configuration the bullhead silhouette is built around.
The case wears taller than its 38mm diameter suggests, with a rounded profile that pushes the lugs out rather than down. The top-mounted pusher layout still keeps the watch within a contained footprint on the wrist, and the silhouette reads as a faithful reproduction rather than a loose reinterpretation.
3. The panda dial and bracelet carry over from the 8110
The dial keeps the panda contrast that defined the vintage 8110: white field, black subdials, orange chronograph hand. A mineral crystal covers the dial, and the factory bracelet is a slim single-row steel design with compact folded links that keep the proportions tight against the wrist.
4. The quartz movement is the biggest trade-off
The most visible shift from the original is the movement. Citizen swapped the vintage flyback mechanical caliber for an in-house quartz movement, which strips out the flyback complication that defined the 8110.
The trade buys two things: a lower price tier, and lower barriers to owning an 8110-era Bullhead. Buyers chasing the original’s mechanical character will need to stay on the vintage market, where standard examples can still be found from a few hundred dollars upward.
5. Brad Pitt’s Once Upon A Time In Hollywood turn pushed demand
Interest in the Bullhead spiked after Brad Pitt wore a vintage gold 8110 as Cliff Booth in Quentin Tarantino’s 2019 film, and search demand has held steady since.
6. The market expansion goes Japan to Europe to US
Citizen first put the modern Tsuno back on the Japanese market in 2021 with the panda-dial AN3660-81A and the all-navy AN3660-81L, then expanded the JDM lineup in 2023 with a black AN3660-81E, a 2,300-piece orange AN3660-81X limited edition, and a 200-piece champagne AN3660-81P exclusive for retailer OnTime Move.
The 2026 news is the standard panda dial reaching Europe under AN3660-81A alongside a 4,000-piece luminous-green limited edition, plus multiple color variants reaching US buyers through Amazon for the first broad stateside release. The Star Wars x Citizen Tsuno collection from Fall 2022 (R2-D2, C-3PO, Darth Maul, Darth Vader) has been available on US Amazon since launch under the same bullhead case and quartz platform.
7. The pricing lands below the four-figure tier
The Challenge Timer “Tsuno” sits below the four-figure tier typical of Japanese vintage chronograph homages, and Citizen has positioned it as the most accessible new Bullhead offering in the modern era.
Price: From €229
Where to Buy: Google, Amazon (Darth Vader, R2-D2, Darth Maul)
The bottom line
At its EU launch price, the Challenge Timer “Tsuno” is the most accessible Bullhead Citizen has put in front of Western buyers in the modern era. The quartz movement strips out the flyback complication but takes the price below the four-figure tier of comparable vintage-inspired chronographs. The move to US Amazon distribution opens the standard panda-dial Challenge Timer to American buyers after a five-year Japan-only run, joining the Star Wars Tsuno editions that have been on Amazon since 2022. For buyers priced out of the gold panda variant Pitt wore, the EU and US rollouts are the cleanest new entry into the Bullhead lineage in years.
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(as of May 10, 2026 12:01 GMT -05:00 - More infoProduct prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.)
