Seiko Cal. 5640 - 376

The Seiko 5640-376 represents an important milestone in Seiko's 1988 lineup. Powered by the 5640 caliber with 19j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-b267ca99b98d]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

13.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1988

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