Seiko Cal. 6656 - 407

The Seiko 6656-407 represents an important milestone in Seiko's 1971 lineup. Powered by the 6656 caliber with 33j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-01cde1a47c84]

Also known as: Silverwave

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1971

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