Seiko Cal. 0721 - 738

This Spring Drive model from 1968 features a 35mm Titanium case. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-3d055bc829b5]

Also known as: World Timer, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1968

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