Seiko Cal. 5640 - 337

Released in 1992, the Cal. 5640 with design code 337 was part of Seiko's domestic market collection. It features a Silver dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-e6c6e7974ea8]

Also known as: UFO, Emperor

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Silver

Jewels

33j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1992

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