The Seiko Presage SSA425J1 (also known as the "Style 60s" Open Heart) is an automatic watch with manual winding capacity, featuring a stainless steel case and bracelet, a black dial, and a box-shaped Hardlex crystal. 

Movement 

• Caliber: 4R39
• Power Reserve: Approximately 41 hours
• Jewels: 24
• Hand Winding: Yes
• Stop Seconds Hand: Yes 

Case 

• Material: Stainless steel
• Diameter: 40.8mm
• Thickness: 12.8mm
• Length: 47mm
• Back: See-through screw case back 

Dial 

• Color: Black
• Hands/Indexes: Silver-tone with LumiBrite
• Features: "Open heart" design (aperture showing the movement) and a 24-hour sub-dial
• Crystal: Box-shaped Hardlex 

Band 

• Material: Stainless steel
• Clasp: Three-fold clasp with push-button release
• Length: 200mm

Water Resistance 

• Rating: 5 bar / 50 meters