NH70 Skeleton Automatic Movement scaled up proportionally for the

scaled up proportionally for the bigger case

8 mm dial drops into the Seikonaut Nautilus-style 40 mm case and other 30

5 mm Royal Oak dials

600 bph frequency

8 mm dial with components designed for the 41mm platform:

NH70 Skeleton Automatic Movement scaled up proportionally for theThe Seiko NH70 is the entry level skeleton movement in the NH family. Manufactured by TMI (Time Module Inc.), a subsidiary of Seiko Instruments, the NH70 features open worked bridges in a natural silver finish that expose the movements inner mechanics through a skeleton dial. It shares the 21,600 bph frequency, 24 jewels, 41 hour power reserve, hacking, and hand winding of the solid NH35 family, but trades the date complication for the open worked