Seiko Cal. 5257 - 778

This Hand-Winding model from 1978 features a 41mm Hardlex-Coated Steel case. It features a White dial protected by a Sapphire crystal and offers 110m of water resistance. [seikata-wm-0b2255af6e7f]

Also known as: Helmet, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

13.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

White

Jewels

26j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1978

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