Seiko Cal. 3863 - 720

Seiko 3863-720

The Seiko 3863-720 represents an important milestone in Seiko's 1976 lineup. Powered by the 3863 caliber with 31j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-f7603395e8cb]

Also known as: Sportsmatic

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
36mm
Case Thickness
12.6mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
50m
Dial Color
Cream
Jewels
31j
Frequency
28,800 bph
Power Reserve
39 hours
Year
1976

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