Seiko Cal. 3840 - 712

The Seiko 3840-712 represents an important milestone in Seiko's 1985 lineup. Powered by the 3840 caliber with 34j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-cd365168d6fb]

Also known as: Silverwave

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

45mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Navy

Jewels

34j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1985

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