Seiko Cal. 6657 - 345

The Seiko 6657-345 represents an important milestone in Seiko's 1990 lineup. Powered by the 6657 caliber with 31j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-5994251e55b6]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1990

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