Seiko Cal. 6645 - 581

The 6645-581 is a sought-after Solar piece from Seiko's golden era. It features a Navy dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-23e665400910]

Also known as: Sportsmatic, Emperor

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

13.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1976

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