Seiko Cal. 6390 - 397

This Spring Drive model from 1987 features a 36mm Hardlex-Coated Steel case. Powered by the 6390 caliber with 33j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-04bc6ea0f0c6]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1987

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