Seiko Cal. 4537 - 688

The Seiko 4537-688 represents an important milestone in Seiko's 1972 lineup. Powered by the 4537 caliber with 31j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-2a522e89792c]

Also known as: Baby Tuna, Flighty

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1972

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