The Seiko Presage SSA425J embodies mechanical precision, featuring an open-heart movement and crafted in Japan. Powered by the Seiko calibre 4R39, this watch offers both manual and self-winding automatic capabilities, maintaining an accuracy tolerance of 45 / -25 seconds per day and a power reserve of 41 hours. Encased in a 40.8mm stainless steel case with a thickness of 12.8mm, it is paired with a stainless-steel bracelet adorned with luminescent hands and indexes.Equipped with a box-shaped hardlex glass and a three-fold push-button release clasp, this watch boasts a water resistance rating of 50m. Additional features include a screw case back, exhibition case back, a 24-hour sub dial, and an open-heart movement, offering glimpses of its intricate mechanics.Inspired by the Crown Chronograph introduced in 1964, the new Seiko Presage Style60's series combines vintage design with contemporary elements, resulting in a retro-inspired collection perfectly suited for modern times. The vintage aesthetic, black dial, grey hands and markers, and the captivating open-heart movement all contribute to the timeless appeal of this watch.- Caliber No. 4R39- Automatic Movement – Powered by the movement of the wearer- 41 Hours Reserve - 40.8mm Case Size - 12.8mm Case Thickness - 140g Weight - Stainless Steel Case and Bracelet - Hardlex Glass - Pull Out Crown- 50 Meters Water Resistant - Exhibition Case Back