Seiko Cal. 6657 - 976

The 6657-976 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6657 caliber with 36j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-30801388b118]

Also known as: Sportsmatic, Emperor

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

36j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1981

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