Seiko Cal. 5688 - 387

Released in 1984, the Cal. 5688 with design code 387 was part of Seiko's domestic market collection. The Coin-Edge bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-97ea1bec7ef5]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

34mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1984

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