Seiko Cal. 5639 - 373

Seiko 5639-373

The Seiko 5639-373 represents an important milestone in Seiko's 1973 lineup. Powered by the 5639 caliber with 18j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-cc5a8032e1e5]

Also known as: Bullhead, Baby Tuna

Specifications

Movement
Kinetic
Case Material
Stainless Steel
Case Width
43mm
Case Thickness
13.1mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
70m
Dial Color
Champagne
Jewels
18j
Frequency
28,800 bph
Power Reserve
51 hours
Year
1973

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