Seiko Cal. 5640 - 276

The Seiko 5640-276 represents an important milestone in Seiko's 1986 lineup. Powered by the 5640 caliber with 19j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-f0b7d51954c1]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

36mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Champagne

Jewels

19j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1986

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