Seiko Cal. 3891 - 657

The 3891-657 is a sought-after Solar piece from Seiko's golden era. Powered by the 3891 caliber with 31j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-87853cac7126]

Also known as: Navigator, Sea Horse

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

41mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1969

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