Seiko Cal. 7090 - 644

This Automatic model from 1977 features a 42mm PVD Black case. Powered by the 7090 caliber with 31j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-98ca435e22b5]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1977

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