Seiko Cal. 5639 - 218

The Seiko 5639-218 represents an important milestone in Seiko's 1975 lineup. Powered by the 5639 caliber with 27j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-c5bceac52ae1]

Also known as: Turtle, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Burgundy

Jewels

27j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1975

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