Seiko Presage SSA441J1 is a mechanical automatic watch with an open heart movement and is Made in Japan. The SSA441J1 features the Seiko calibre 4R38 that is both manual as well as a self winding automatic movement with a normal operating accuracy tolerance of +45 / -35 seconds per day and a power reserve of 41 hours. The watch has a 40.5mm stainless steel case with thickness of 11.8mm, a stainless steel bracelet with matching hands and indexes, box shape hardlex glass and a three-fold push button release clasp. Water resistance rating is 50m and additional features include a screw case back, exhibition case back and an open heart movement. A link to the online instructions manual is also sent within the email.