Seiko Cal. 6640 - 780

This Hand-Winding model from 1976 features a 39mm PVD Black case. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-f3e06d5efe6b]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

29j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1976

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