Seiko Cal. 7028 - 640

The Seiko 7028-640 represents an important milestone in Seiko's 1972 lineup. It features a Green dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-eac555103b7b]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

110m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1972

Related Models

• Seiko 7120-656
• Seiko 0783-695
• Seiko 4455-868
• Seiko 6261-593
• Seiko 6119-632
• Seiko 7177-249
• Seiko 5698-241
• Seiko 5618-894
• Seiko 3849-630
• Seiko 7020-386
• Seiko 6698-807
• Seiko 4528-889