The NH06 SII automatic watch movement is a self-winding Seiko Group caliber with three hands (hour/minute/sweep second), measuring 7¾ lignes, with a diameter of 17.50 mm and a movement height of 5.92 mm. It is a 21-jewel movement featuring a day and date window at the 3 o’clock position, uses 100/65/21 hand sizes, and requires stem part number 351-420.
