Seiko Cal. 6657 - 504

Released in 1985, the Cal. 6657 with design code 504 was part of Seiko's domestic market collection. Powered by the 6657 caliber with 30j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-b8af0ba15d3a]

Also known as: Rally, Flighty

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

120m

Dial Color

Burgundy

Jewels

30j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1985

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