Seiko Cal. 6657 - 441

Seiko 6657-441

The 6657-441 is a sought-after Automatic piece from Seiko's golden era. With its 19mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-df866aba7e61]

Also known as: Sumo

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
13.4mm
Lug Width
19mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
50m
Dial Color
Navy
Jewels
27j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1974

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