Seiko Cal. 6655 - 138

The Seiko 6655-138 represents an important milestone in Seiko's 1972 lineup. Powered by the 6655 caliber with 20j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-dcf078b74cfd]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1972

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