Seiko Cal. 5638 - 977

The 5638-977 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5638 caliber with 17j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-844baec02f1d]

Also known as: Turtle, World Timer

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

35mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

White

Jewels

17j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1979

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