Seiko Cal. 7028 - 939

The 7028-939 is a sought-after Quartz piece from Seiko's golden era. Powered by the 7028 caliber with 23j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-4ccd79a87234]

Also known as: Monster, Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

45mm

Case Thickness

14.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1974

Related Models

• Seiko 5647-107
• Seiko 6112-299
• Seiko 6616-753
• Seiko 4494-329
• Seiko 6388-225
• Seiko 7020-976
• Seiko 4415-737
• Seiko 6161-573
• Seiko 3818-633
• Seiko 5257-972
• Seiko 6366-970
• Seiko 7155-890