Seiko Cal. 6644 - 138

This Automatic model from 1991 features a 39mm Two-Tone case. It features a Black dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-78c47866ce0e]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1991

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