Seiko Cal. 5257 - 237

This Spring Drive model from 1966 features a 44mm Hardlex-Coated Steel case. The Fixed bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-8c9aad6269cc]

Also known as: Navigator, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1966

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