Seiko Cal. 3870 - 321

The Seiko 3870-321 represents an important milestone in Seiko's 1967 lineup. It features a Burgundy dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-328d9c6eab69]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

41mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

25j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1967

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