Seiko Cal. 6643 - 355

Seiko 6643-355

This Automatic model from 1977 features a 37mm Two-Tone case. The Coin-Edge bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-0e3d4bf07f14]

Also known as: UFO, Baby Tuna

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
37mm
Case Thickness
13.2mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
130m
Dial Color
White
Jewels
28j
Frequency
36,000 bph
Power Reserve
47 hours
Year
1977

Related Models

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