Seiko Cal. 6640 - 624

The 6640-624 is a sought-after Solar piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-a3efe9913c7d]

Also known as: Sea Horse, Emperor

Specifications

Movement

Solar

Case Material

Titanium

Case Width

42mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Black

Jewels

19j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1985

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