Seiko Cal. 5641 - 612

Released in 1978, the Cal. 5641 with design code 612 was part of Seiko's domestic market collection. It features a Green dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-5bb871bca6a9]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1978

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