Seiko Cal. 3878 - 656

Released in 1975, the Cal. 3878 with design code 656 was part of Seiko's domestic market collection. With its 22mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-caca896baec0]

Also known as: Monster, UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

70m

Dial Color

Burgundy

Jewels

23j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1975

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