Seiko Cal. 5663 - 726

The 5663-726 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5663 caliber with 36j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-34b5a2f7c5fa]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

43mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

White

Jewels

36j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1979

Related Models

• Seiko 6319-737
• Seiko 6177-219
• Seiko 7074-936
• Seiko 5256-897
• Seiko 6672-490
• Seiko 6622-503
• Seiko 5635-108
• Seiko 3859-513
• Seiko 7075-481
• Seiko 5258-454
• Seiko 6374-403
• Seiko 0767-740