Seiko Cal. 5640 - 976

Released in 1990, the Cal. 5640 with design code 976 was part of Seiko's domestic market collection. Powered by the 5640 caliber with 36j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-605c01465e71]

Also known as: Sea Horse

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

44mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Burgundy

Jewels

36j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1990

Related Models

• Seiko 4411-970
• Seiko 5272-489
• Seiko 7180-393
• Seiko 4432-158
• Seiko 4459-255
• Seiko 6330-715
• Seiko 7161-765
• Seiko 6161-801
• Seiko 6391-292
• Seiko 6635-521
• Seiko 4467-231
• Seiko 4530-319