Seiko Cal. 6657 - 291

The 6657-291 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6657 caliber with 36j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-3c67b1b051c2]

Also known as: UFO, Sea Horse

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Champagne

Jewels

36j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1992

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