Seiko Cal. 5638 - 389

The 5638-389 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-f8e8dda2c3a4]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Silver

Jewels

28j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1994

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