Seiko Cal. 6633 - 143

This Hand-Winding model from 1977 features a 42mm PVD Black case. Powered by the 6633 caliber with 36j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-aeb0b6f45412]

Also known as: Tuna, World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1977

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