Seiko Cal. 7178 - 307

Seiko 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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