Seiko Cal. 5640 - 104

The 5640-104 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5640 caliber with 21j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-207e7d48f601]

Also known as: Bellmatic, Navigator

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1975

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