Seiko Cal. 4420 - 357

This Spring Drive model from 1965 features a 40mm PVD Black case. It features a White dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-723ceda15fb4]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

White

Jewels

35j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1965

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