Seiko Cal. 3898 - 644

The Seiko 3898-644 represents an important milestone in Seiko's 1973 lineup. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-4b3720cde724]

Also known as: Tuna, Rally

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1973

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