Seiko Cal. 6639 - 367

This Automatic model from 1969 features a 44mm Hardlex-Coated Steel case. It features a Green dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-972b436ae36c]

Also known as: UFO, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Green

Jewels

32j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1969

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