Seiko Cal. 3840 - 677

Seiko 3840-677

The Seiko 3840-677 represents an important milestone in Seiko's 1980 lineup. Powered by the 3840 caliber with 20j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-3fd780e59122]

Also known as: Sportsmatic, Navigator

Specifications

Movement
Kinetic
Case Material
Two-Tone
Case Width
45mm
Case Thickness
14.9mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
160m
Dial Color
Navy
Jewels
20j
Frequency
21,600 bph
Power Reserve
62 hours
Year
1980

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seikata-wm-3fd780e59122