Seiko Cal. 5640 - 146

Seiko 5640-146

The Seiko 5640-146 represents an important milestone in Seiko's 1967 lineup. Powered by the 5640 caliber with 18j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-d58b24022728]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
34mm
Case Thickness
10.6mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
200m
Dial Color
Silver
Jewels
18j
Frequency
21,600 bph
Power Reserve
49 hours
Year
1967

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