Seiko Cal. 4487 - 726

Released in 1981, the Cal. 4487 with design code 726 was part of Seiko's domestic market collection. It features a Black dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-82ec9696dfe7]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Black

Jewels

17j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1981

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