Seiko Cal. 3864 - 257

The Seiko 3864-257 represents an important milestone in Seiko's 1979 lineup. Powered by the 3864 caliber with 36j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-d4ad5e1c3a07]

Also known as: Navigator, Crown

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

46mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Cream

Jewels

36j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1979

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