Seiko Cal. 6638 - 493

This Spring Drive model from 1971 features a 44mm PVD Black case. It features a Burgundy dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-93eb6bb5d788]

Also known as: Samurai, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Burgundy

Jewels

32j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1971

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