Seiko Cal. 6278 - 491

The 6278-491 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6278 caliber with 27j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-eb7bd5a273d7]

Also known as: Helmet, Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

12.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1988

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