Seiko Cal. 6657 - 963

Released in 1999, the Cal. 6657 with design code 963 was part of Seiko's domestic market collection. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-faef9ddb08c8]

Also known as: Helmet, Crown

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Silver

Jewels

26j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1999

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