Seiko Cal. 3878 - 928

The 3878-928 is a sought-after Quartz piece from Seiko's golden era. Powered by the 3878 caliber with 35j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-4ad0121ce9e7]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

40mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

200m

Dial Color

Silver

Jewels

35j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1972

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