Seiko Cal. 3877 - 120

The Seiko 3877-120 represents an important milestone in Seiko's 1983 lineup. Powered by the 3877 caliber with 29j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-85d6642484bb]

Also known as: Sportsmatic, Arnie

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

29j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1983

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