Seiko Cal. 3877 - 307

The Seiko 3877-307 represents an important milestone in Seiko's 1970 lineup. It features a Navy dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-e80b8931ae39]

Also known as: Helmet, Goldfeather

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1970

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