Seiko Cal. 6638 - 165

Released in 1983, the Cal. 6638 with design code 165 was part of Seiko's domestic market collection. Powered by the 6638 caliber with 32j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-b5da8ef4fb09]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

41mm

Case Thickness

13.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

32j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1983

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