Seiko Cal. 5640 - 507

The Seiko 5640-507 represents an important milestone in Seiko's 1977 lineup. Powered by the 5640 caliber with 28j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-c88f69aea3d1]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

11.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Champagne

Jewels

28j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1977

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