For sale is a beautiful and super rare flyback hi-beat chronograph: the Citizen Challenge Timer ref. 67-9577. When this watch was produced in the early ‘70s it was the smallest and most complicated chronograph of the time. This watch is now very rare, especially to find one in such a good condition as mine. ⚙️ Cal. 8100A automatic, 23jewels, Hi-Beat 28800 bph. 📐 Size 38 mm. 🗓️ Manufactured in April, 1973. 👉 Details: - original black dial with colorful sub-dial at 6o’clock. - chronograph with flyback function (instant reset and restart of chrono without having to stop it first) - original crystal. - black case with ss bezel, the case has the shape of a helmet. - day / date calendar at 3o’clock, day in Japanese kanji and English. - it is possible to quick set the date. - original crown with logo. - high quality handmade leather strap, to match the colors on the dial. - the watch has been serviced and runs smooth with no errors in all its functions. 💶 Price: The price of € 340 (or $ 370) includes worldwide shipping. I can support with reducing import duty fees via my shipping agent. 🤝 Payment method: PayPal F&F (or for G&S +5% paid by buyer), Wise, Western Union. 📨 Let’s chat: Additional pictures and videos are available in dm. I invite you to chat with me if you like this watch. 🙏 Please follow my Instagram for more: https://www.instagram.com/gabe_watch/