Seiko Cal. 5640 - 320

The 5640-320 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5640 caliber with 30j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-90fa992a1640]

Also known as: Arnie

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1986

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