Seiko Cal. 5640 - 711

The 5640-711 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5640 caliber with 36j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-5642fedbcbed]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

36j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1990

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