Seiko Cal. 5631 - 395

Seiko 5631-395

The Seiko 5631-395 represents an important milestone in Seiko's 1975 lineup. Powered by the 5631 caliber with 21j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-c2eaf65d4093]

Also known as: Navigator, Arnie

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
34mm
Case Thickness
11.4mm
Lug Width
18mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
150m
Dial Color
Blue Sunburst
Jewels
21j
Frequency
36,000 bph
Power Reserve
44 hours
Year
1975

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