Seiko Cal. 4487 - 549

The Seiko 4487-549 represents an important milestone in Seiko's 1970 lineup. With its 21mm lug width and 10.7mm profile, it sits comfortably on most wrists. [seikata-wm-411bd40b48da]

Also known as: Bullhead, Helmet

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1970

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