Seiko Cal. 6647 - 216

Seiko 6647-216

This Automatic model from 1981 features a 42mm Hardlex-Coated Steel case. The Bidirectional bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-793ba810facf]

Also known as: Sumo

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
8.7mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
60m
Dial Color
Green
Jewels
35j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1981

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