Seiko Cal. 5638 - 136

The 5638-136 is a sought-after Solar piece from Seiko's golden era. With its 18mm lug width and 10.1mm profile, it sits comfortably on most wrists. [seikata-wm-af0af2812c9d]

Also known as: Monster, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Navy

Jewels

23j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1981

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