Seiko Cal. 3878 - 631

Seiko 3878-631

This Kinetic model from 1999 features a 41mm PVD Black case. With its 22mm lug width and 9.6mm profile, it sits comfortably on most wrists. [seikata-wm-7f2eeefa2e2d]

Also known as: Tuna, World Timer

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
41mm
Case Thickness
9.6mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
40m
Dial Color
White
Jewels
34j
Frequency
21,600 bph
Power Reserve
43 hours
Year
1999

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