Seiko Cal. 4487 - 394

The Seiko 4487-394 represents an important milestone in Seiko's 1970 lineup. It features a Navy dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-5d808afb32df]

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Navy

Jewels

21j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1970

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