Seiko Cal. 6639 - 260

The 6639-260 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6639 caliber with 36j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-6214bdb1ac06]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1992

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