Seiko Presage SSA397 Green Dial Power Reserve Masterpiece 100 meters (330 feet)

100 meters (330 feet)

The buttons are protected against the entry of mud

Featuring numbers and specs laser-engraved on the bezel and band

Both the Heuer and the other references like the LeJour 7750 used the Day-Date Chronograph Valjoux 7750 and as you can tell this is how the LeJour got its reference name

making it possible to swiftly measure the pulse of oneself or a patient

Seiko Presage SSA397 Green Dial Power Reserve Masterpiece 100 meters (330 feet)From the Presage Collection Fine mechanical watchmaking from Japan Manual and automatic winding capabilities 21,600 vibrations per hour Power reserve: approximately 41 hours