Seiko Cal. 6657 - 173

The Seiko 6657-173 represents an important milestone in Seiko's 1984 lineup. Powered by the 6657 caliber with 31j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-ac059f54a36e]

Also known as: Sumo, Silverwave

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

13.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1984

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