Seiko Cal. 4431 - 723

Released in 1989, the Cal. 4431 with design code 723 was part of Seiko's domestic market collection. Powered by the 4431 caliber with 36j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-aab85ad61b3b]

Also known as: Rally, Crown

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Green

Jewels

36j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1989

Related Models

• Seiko 6616-291
• Seiko 5687-739
• Seiko 5215-579
• Seiko 6622-686
• Seiko 5665-298
• Seiko 6141-355
• Seiko 4498-690
• Seiko 4584-291
• Seiko 6215-164
• Seiko 7153-759
• Seiko 6158-653
• Seiko 7018-753