Seiko Cal. 7139 - 220

The 7139-220 is a sought-after Automatic piece from Seiko's golden era. Powered by the 7139 caliber with 31j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-54a5a668db66]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

White

Jewels

31j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1980

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