Seiko Cal. 7031 - 391

Seiko 7031-391

The Seiko 7031-391 represents an important milestone in Seiko's 1979 lineup. Powered by the 7031 caliber with 26j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-4e9c771ca1ae]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement
Kinetic
Case Material
Gold-Plated
Case Width
40mm
Case Thickness
10.2mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
60m
Dial Color
Burgundy
Jewels
26j
Frequency
28,800 bph
Power Reserve
36 hours
Year
1979

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