Seiko Cal. 5689 - 437

Seiko 5689-437

This Automatic model from 1986 features a 45mm Two-Tone case. Powered by the 5689 caliber with 18j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-cf7ce8ccf735]

Also known as: Sumo, Bellmatic

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
45mm
Case Thickness
8.0mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
110m
Dial Color
Silver
Jewels
18j
Frequency
28,800 bph
Power Reserve
60 hours
Year
1986

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