The 79360N is the Black Bay Chrono, introduced in 2017. Its movement, calibre MT5813, is based on Breitling's chronograph calibre B01 and adapted by Tudor; in return Tudor supplied Breitling with a base movement for models of its own. The result is a chronograph with a column wheel, a vertical clutch, about 70 hours of power reserve and a COSC certificate.
The case measures 41 mm, the steel bezel carries a tachymeter scale, and the pushers screw down, making the watch water-resistant to 200 metres, which is exceptional for a chronograph. The dial has two sub-dials and a date; since 2021 the watch has existed with a light dial and black sub-dials and with a black dial and light sub-dials, better known as panda and reverse panda.
On a pre-owned example we test the chronograph completely: start, stop, reset and the running of the sub-dials. We also look at the screw-down pushers and crown, the steel bezel, the bracelet or strap and the set. Because a chronograph has more parts than a simple movement, we state a recent service when there is one.