Seiko Cal. 3816 - 642

Seiko 3816-642

This Automatic model from 1972 features a 36mm Two-Tone case. Powered by the 3816 caliber with 25j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-4ca7a207b2f9]

Also known as: Sportsmatic

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
36mm
Case Thickness
8.4mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
110m
Dial Color
White
Jewels
25j
Frequency
28,800 bph
Power Reserve
38 hours
Year
1972

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