Seiko Cal. 5684 - 657

Released in 1972, the Cal. 5684 with design code 657 was part of Seiko's domestic market collection. With its 22mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-c09247bc18ab]

Also known as: Sportsmatic, Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Green

Jewels

35j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1972

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