Seiko Cal. 6687 - 241

The Seiko 6687-241 represents an important milestone in Seiko's 1971 lineup. The Coin-Edge bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-5adcbf8ba3f5]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

White

Jewels

24j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1971

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