Seiko Cal. 6641 - 511

This Automatic model from 1974 features a 40mm Two-Tone case. Powered by the 6641 caliber with 21j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-111149524367]

Also known as: Silverwave

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1974

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