Seiko Cal. 3877 - 644

The Seiko 3877-644 represents an important milestone in Seiko's 1987 lineup. Powered by the 3877 caliber with 32j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-fb5b5a37558a]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1987

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