Seiko Cal. 5640 - 104

This Automatic model from 1967 features a 45mm PVD Black case. Powered by the 5640 caliber with 26j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-8f2a4b359ff1]

Also known as: Samurai, Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1967

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