Seiko Cal. 4487 - 765

The Seiko 4487-765 represents an important milestone in Seiko's 1972 lineup. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-d72bea13a4a7]

Also known as: Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

32j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1972

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