Seiko Cal. 6638 - 460

The Seiko 6638-460 represents an important milestone in Seiko's 1966 lineup. Powered by the 6638 caliber with 24j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-ee55be8a3306]

Also known as: Sea Horse, Arnie

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

14.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

24j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1966

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