Seiko Cal. 5640 - 439

The Seiko 5640-439 represents an important milestone in Seiko's 1997 lineup. It features a Champagne dial protected by a Mineral crystal and offers 80m of water resistance. [seikata-wm-09c22cf77c3b]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Champagne

Jewels

36j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1997

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