Seiko Cal. 6699 - 537

The Seiko 6699-537 represents an important milestone in Seiko's 1975 lineup. Powered by the 6699 caliber with 17j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-2ecba4112d3d]

Also known as: Bullhead

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

14.2mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Burgundy

Jewels

17j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1975

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