Seiko Cal. 5641 - 721

Released in 1976, the Cal. 5641 with design code 721 was part of Seiko's domestic market collection. It features a Green dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-396343727324]

Also known as: Sportsmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

46mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1976

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