Seiko Cal. 3864 - 730

The Seiko 3864-730 represents an important milestone in Seiko's 1981 lineup. Powered by the 3864 caliber with 27j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-a88d7cb2b942]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

White

Jewels

27j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1981

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