Seiko Cal. 7139 - 287

The 7139-287 is a sought-after Automatic piece from Seiko's golden era. Powered by the 7139 caliber with 36j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-2040e950ceb0]

Also known as: Helmet, World Timer

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1989

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