Let's get some quick specs out of the way, shall we? Both sizes have dates at six link o'clock and use Omega's automatic Co-Axial Master Chronometer Caliber 8800, which is certified by METAS and runs at 3.5 Hz with a power reserve of 55 hours. Both sizes are water-resistant to 150 meters, have sapphire crystals front and back, and come fitted to matching steel bracelets.