Seiko Cal. 5640 - 548

Seiko 5640-548

The 5640-548 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5640 caliber with 22j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-ac83822886cc]

Also known as: Helmet

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
45mm
Case Thickness
12.3mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
80m
Dial Color
Navy
Jewels
22j
Frequency
36,000 bph
Power Reserve
39 hours
Year
1976

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seikata-wm-ac83822886cc