Seiko Cal. 3877 - 578

The Seiko 3877-578 represents an important milestone in Seiko's 1971 lineup. With its 20mm lug width and 15.1mm profile, it sits comfortably on most wrists. [seikata-wm-4c41d1d8c7c5]

Also known as: UFO

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1971

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