Seiko Cal. 5630 - 745

The 5630-745 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5630 caliber with 22j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-2f410aa232d1]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

12.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1988

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