Seiko Cal. 5638 - 827

The 5638-827 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5638 caliber with 17j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-fd0985a7165e]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

36mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1977

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