Seiko Cal. 4517 - 640

The Seiko 4517-640 represents an important milestone in Seiko's 1978 lineup. It features a Cream dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-cf229f21abd4]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

36j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1978

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