Seiko Cal. 3878 - 327

Released in 1966, the Cal. 3878 with design code 327 was part of Seiko's domestic market collection. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-cb91ad660946]

Also known as: Helmet, Rally

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1966

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