Prospex Automatic Diver Manual and automatic winding capabilities 21,600 vibrations per hour Power reserve: approximately 41 hours 24 jewels One-way rotating elapsed timing bezel Black dial with sunray finish Magnified day/date calendar Lumi Brite hands and markers Screwdown crown and caseback The Seiko Monster retains the essentials of the original such as the excellent bracelet and reliable 4R36 automatic movement. However, there is a new case and bezel featuring a more sculpted look. The finish on the case and case back is also more refined than the original. There is also a new dial with a return to rectangular style luminous hour markers. The day and date window has a magnifier lens over it to improve readability. The powerful Seiko Lumi Brite luminescent material is of course still used and it retains the same brilliant glowing properties that made the original Monster such a huge worldwide phenomenon. It is a different color this time. It glows with a blue color on the this model. Still an awesome sight in the dark after charging it with a bright light source. You will also notice a new nicely machined crown that is a bit easier to grip than the previous version.