Seiko Cal. 3880 - 770

The 3880-770 is a sought-after Quartz piece from Seiko's golden era. Powered by the 3880 caliber with 29j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-a61c47f0dfb1]

Also known as: Rally, Sportsmatic

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

42mm

Case Thickness

11.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1968

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