Seiko Cal. 7131 - 630

The Seiko 7131-630 represents an important milestone in Seiko's 1968 lineup. Powered by the 7131 caliber with 18j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-c71ad2384c11]

Also known as: Sumo, Flighty

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

14.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1968

Related Models

• Seiko 6365-323
• Seiko 7035-282
• Seiko 4420-767
• Seiko 6264-472
• Seiko 4462-575
• Seiko 0794-932
• Seiko 6626-627
• Seiko 6665-684
• Seiko 6385-157
• Seiko 5649-610
• Seiko 5658-589
• Seiko 7115-433