Seiko Cal. 6138 - 656

The Seiko 6138-656 represents an important milestone in Seiko's 1975 lineup. Powered by the 6138 caliber with 28j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-a206fbc663c3]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

80m

Dial Color

Green

Jewels

28j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1975

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