Seiko Cal. 0720 - 664

Released in 1965, the Cal. 0720 with design code 664 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-ddceaf3ce2e0]

Also known as: Navigator

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1965

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