Seiko Cal. 6657 - 612

Seiko 6657-612

The 6657-612 is a sought-after Solar piece from Seiko's golden era. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-aeadcd5b92e1]

Also known as: Baby Tuna

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
8.6mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
30m
Dial Color
Champagne
Jewels
29j
Frequency
36,000 bph
Power Reserve
66 hours
Year
1978

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