Seiko Cal. 6654 - 537

The Seiko 6654-537 represents an important milestone in Seiko's 1971 lineup. Powered by the 6654 caliber with 20j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-a4af98ab4566]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

45mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1971

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