Seiko Cal. 7028 - 631

The 7028-631 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7028 caliber with 25j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-5bd6a0a5c051]

Also known as: Samurai, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1970

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