Seiko Cal. 7178 - 307

The Seiko 7178-307 represents an important milestone in Seiko's 1968 lineup. Powered by the 7178 caliber with 31j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-e539d0fb964f]

Also known as: Navigator

Specifications

Movement

Solar

Case Material

Titanium

Case Width

38mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1968

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