Seiko Cal. 3827 - 687

The Seiko 3827-687 represents an important milestone in Seiko's 1970 lineup. Powered by the 3827 caliber with 17j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-4c732e9f03c7]

Also known as: Monster, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Champagne

Jewels

17j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1970

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