Seiko Cal. 5638 - 123

The 5638-123 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5638 caliber with 26j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-dc5608e14c59]

Also known as: UFO, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1999

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