Seiko Cal. 3878 - 687

Seiko 3878-687

This Automatic model from 1967 features a 35mm Stainless Steel case. Powered by the 3878 caliber with 32j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-2793db902ef9]

Also known as: Helmet, Arnie

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
35mm
Case Thickness
8.5mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
50m
Dial Color
Cream
Jewels
32j
Frequency
21,600 bph
Power Reserve
44 hours
Year
1967

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