Seiko Cal. 5653 - 940

The Seiko 5653-940 represents an important milestone in Seiko's 1987 lineup. Powered by the 5653 caliber with 28j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-9c3b318e969a]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

45mm

Case Thickness

15.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1987

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