Seiko Cal. 5640 - 154

Seiko 5640-154

The 5640-154 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5640 caliber with 33j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-2fd0f0a43b5d]

Also known as: Tuna, Bullhead

Specifications

Movement
Kinetic
Case Material
Titanium
Case Width
42mm
Case Thickness
8.8mm
Lug Width
21mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
60m
Dial Color
Champagne
Jewels
33j
Frequency
21,600 bph
Power Reserve
53 hours
Year
1981

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