Seiko Cal. 6657 - 726

Seiko 6657-726

The 6657-726 is a sought-after Solar piece from Seiko's golden era. Powered by the 6657 caliber with 20j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-06fa114745be]

Also known as: Monster

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
14.8mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
110m
Dial Color
White
Jewels
20j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1968

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