Seiko Cal. 5644 - 394

This Automatic model from 1985 features a 40mm PVD Black case. Powered by the 5644 caliber with 31j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-affa65fda1cb]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Black

Jewels

31j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1985

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