Seiko Cal. 6657 - 928

The 6657-928 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6657 caliber with 33j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-8cd319ceba25]

Also known as: Navigator, Golden Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

33j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1991

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