Seiko Cal. 6645 - 993

The 6645-993 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6645 caliber with 26j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-ba2c785797b0]

Also known as: Tuna, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1985

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