Seiko Cal. 0770 - 643

The 0770-643 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 200m of water resistance. [seikata-wm-707f1f786ec6]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

12.6mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1971

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