Sellita Caliber AMT5100 M

The Sellita Caliber AMT5100 M is a bi-compax manual-wind mechanical flyback chronograph watch movement. It is Swiss made with 23 jewels and a beat rate of 28,800vph.

The AMT in the caliber number means that this caliber was produced by Manufacture AMT SA, a division of Sellita that handles higher-end or custom/bespoke movements.

In Hanhart’s own words:

“In tribute to our long tradition of producing chronographs, we are bringing the flyback function back to our most popular collection. Even the historic 417 ES, originally designed for pilots of the German Air Force, was equipped with “Temposchaltung”, as the flyback function is also called. The mechanism allows immediate measurement of a new timing interval by using the reset pusher. The new, first-class AMT5100 M calibre originates from Sellita’s manufacture AMT department. It controls the chronograph via column wheel and has a power reserve of at least 58 hours when fully wound.” –Source

Additional Resources:

• Official SW510 M tech sheets (pdf)
• List of Sellita movements