Seiko Cal. 5278 - 891

This Hand-Winding model from 1968 features a 44mm Hardlex-Coated Steel case. Powered by the 5278 caliber with 36j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-8656541dc999]

Also known as: Sportsmatic, Crown

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1968

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