Seiko Cal. 6637 - 305

The Seiko 6637-305 represents an important milestone in Seiko's 1980 lineup. Powered by the 6637 caliber with 21j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-e36359556979]

Also known as: Navigator, Golden Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

34mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Burgundy

Jewels

21j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1980

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