Seiko Cal. 5638 - 312

The 5638-312 is a sought-after Solar piece from Seiko's golden era. Powered by the 5638 caliber with 25j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-2688526a5ed0]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

38mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Champagne

Jewels

25j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1977

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