Seiko Cal. 3880 - 640

The Seiko 3880-640 represents an important milestone in Seiko's 1992 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-8e630ade1dc6]

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

34j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1992

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