Seiko Cal. 6389 - 987

This Spring Drive model from 1973 features a 43mm Hardlex-Coated Steel case. Powered by the 6389 caliber with 25j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-e955c740623b]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

Silver

Jewels

25j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1973

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