Seiko Cal. 7139 - 531

The Seiko 7139-531 represents an important milestone in Seiko's 1998 lineup. Powered by the 7139 caliber with 35j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-e166b0a55782]

Also known as: Monster, Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

42mm

Case Thickness

11.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Cream

Jewels

35j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1998

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