Seiko Cal. 7040 - 644

This Quartz model from 1970 features a 42mm Titanium case. Powered by the 7040 caliber with 21j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-698a69918dc5]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

42mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1970

Related Models

• Seiko 7057-952
• Seiko 4438-761
• Seiko 7194-363
• Seiko 7038-170
• Seiko 3830-604
• Seiko 3814-520
• Seiko 7037-349
• Seiko 7086-383
• Seiko 5294-935
• Seiko 6195-773
• Seiko 6225-566
• Seiko 5689-137