Seiko Cal. 3888 - 686

This Spring Drive model from 1971 features a 44mm PVD Black case. Powered by the 3888 caliber with 29j jewels beating at 21,600 bph, it delivers a 64 hours power reserve. [seikata-wm-ee2ea8d4155b]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Champagne

Jewels

29j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1971

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