Seiko Cal. 5639 - 820

Released in 1995, the Cal. 5639 with design code 820 was part of Seiko's domestic market collection. With its 19mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-db43751bdb8b]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1995

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