Seiko Cal. 5631 - 826

The 5631-826 is a sought-after Solar piece from Seiko's golden era. Powered by the 5631 caliber with 29j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-777f14bb7a77]

Also known as: Monster, World Timer

Specifications

Movement

Solar

Case Material

Titanium

Case Width

46mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

180m

Dial Color

Black

Jewels

29j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1965

Related Models

• Seiko 6264-455
• Seiko 4596-583
• Seiko 6180-642
• Seiko 4512-941
• Seiko 6161-755
• Seiko 7121-913
• Seiko 5293-424
• Seiko 4431-103
• Seiko 4433-209
• Seiko 7057-691
• Seiko 6398-280
• Seiko 5645-551