Seiko Cal. 0778 - 840

This Hand-Winding model from 1975 features a 42mm Two-Tone case. Powered by the 0778 caliber with 18j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-0ec09c1a99c6]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Silver

Jewels

18j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1975

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