Seiko Cal. 3878 - 639

Released in 1983, the Cal. 3878 with design code 639 was part of Seiko's domestic market collection. With its 20mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-350da679cc60]

Also known as: Turtle, Pogue

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

17j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1983

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