Seiko Cal. 6139 - 721

The 6139-721 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6139 caliber with 28j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-64fbde1546c4]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

12.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1985

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