Seiko Cal. 6637 - 713

The Seiko 6637-713 represents an important milestone in Seiko's 1965 lineup. Powered by the 6637 caliber with 28j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-fbcef9bd098e]

Also known as: Silverwave, Emperor

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

42mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

28j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1965

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