Seiko Cal. 3840 - 312

The Seiko 3840-312 represents an important milestone in Seiko's 1967 lineup. Powered by the 3840 caliber with 36j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-46225b336f06]

Also known as: Tuna, Emperor

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

44mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Burgundy

Jewels

36j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1967

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