Seiko Cal. 6657 - 357

The 6657-357 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-3e745c2282da]

Also known as: Sportsmatic, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1984

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