Seiko Cal. 6645 - 559

The 6645-559 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6645 caliber with 21j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-44a3f7fa189b]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1990

Related Models

• Seiko 6362-101
• Seiko 6238-379
• Seiko 3896-515
• Seiko 0710-543
• Seiko 0730-777
• Seiko 6151-490
• Seiko 6685-154
• Seiko 6673-449
• Seiko 6197-290
• Seiko 0778-903
• Seiko 7099-366
• Seiko 6635-358