Seiko Cal. 7131 - 630

Seiko 7131-630

The Seiko 7131-630 represents an important milestone in Seiko's 1968 lineup. Powered by the 7131 caliber with 18j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-c71ad2384c11]

Also known as: Sumo, Flighty

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
44mm
Case Thickness
14.4mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
180m
Dial Color
Cream
Jewels
18j
Frequency
28,800 bph
Power Reserve
72 hours
Year
1968

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