Seiko Cal. 3890 - 644

The Seiko 3890-644 represents an important milestone in Seiko's 1985 lineup. It features a Navy dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-a86cc977dac1]

Also known as: Helmet

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1985

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