Seiko Cal. 3847 - 755

This Spring Drive model from 1980 features a 36mm Hardlex-Coated Steel case. Powered by the 3847 caliber with 29j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-28b5bd546b80]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Burgundy

Jewels

29j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1980

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