Seiko Cal. 7138 - 666

The Seiko 7138-666 represents an important milestone in Seiko's 1986 lineup. Powered by the 7138 caliber with 32j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-271b5169d23b]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1986

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