Seiko Cal. 6657 - 784

Seiko 6657-784

This Hand-Winding model from 1968 features a 37mm Two-Tone case. The Fixed bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-057c549f264e]

Also known as: Sumo, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
37mm
Case Thickness
11.3mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
30m
Dial Color
Champagne
Jewels
34j
Frequency
21,600 bph
Power Reserve
50 hours
Year
1968

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seikata-wm-057c549f264e