Seiko Cal. 6387 - 405

This Spring Drive model from 1971 features a 41mm PVD Black case. Powered by the 6387 caliber with 30j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-7bfb7b26fc7a]

Also known as: Samurai, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Cream

Jewels

30j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1971

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