Seiko Cal. 0730 - 421

Seiko 0730-421

The Seiko 0730-421 represents an important milestone in Seiko's 1967 lineup. Powered by the 0730 caliber with 23j jewels beating at 21,600 bph, it delivers a 71 hours power reserve. [seikata-wm-05fea1e45fea]

Also known as: Tuna, Sportsmatic

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
38mm
Case Thickness
9.8mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
30m
Dial Color
Cream
Jewels
23j
Frequency
21,600 bph
Power Reserve
71 hours
Year
1967

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