Seiko Cal. 6631 - 587

This Automatic model from 1970 features a 39mm Two-Tone case. It features a Navy dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-9f7339404788]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1970

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