Seiko Cal. 5640 - 518

The Seiko 5640-518 represents an important milestone in Seiko's 1983 lineup. Powered by the 5640 caliber with 33j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-b4a0b1c99788]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

8.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

33j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1983

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