Seiko Cal. 0721 - 915

The Seiko 0721-915 represents an important milestone in Seiko's 1971 lineup. It features a Navy dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-a383cf71a5a1]

Also known as: Helmet, Bellmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

13.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1971

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