Seiko Cal. 5278 - 730

The Seiko 5278-730 represents an important milestone in Seiko's 1972 lineup. It features a White dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-8dfbe22b2c81]

Also known as: Sportsmatic, Navigator

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

White

Jewels

25j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1972

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