Seiko Cal. 3859 - 378

Seiko 3859-378

This Automatic model from 1977 features a 42mm Stainless Steel case. Powered by the 3859 caliber with 28j jewels beating at 28,800 bph, it delivers a 71 hours power reserve. [seikata-wm-f0a022fd5523]

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
13.0mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
170m
Dial Color
Blue Sunburst
Jewels
28j
Frequency
28,800 bph
Power Reserve
71 hours
Year
1977

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