Seiko Cal. 7028 - 664

This Spring Drive model from 1980 features a 43mm Gold-Plated case. Powered by the 7028 caliber with 31j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-eb6a0bbed144]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

30m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1980

Related Models

• Seiko 5238-311
• Seiko 6345-606
• Seiko 5675-406
• Seiko 6267-605
• Seiko 6215-322
• Seiko 7143-195
• Seiko 5253-774
• Seiko 5294-124
• Seiko 5699-859
• Seiko 6289-610
• Seiko 6377-721
• Seiko 5628-852