Seiko Cal. 4561 - 900

The Seiko 4561-900 represents an important milestone in Seiko's 1988 lineup. Powered by the 4561 caliber with 17j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-34ba7fb8c284]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

14.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Navy

Jewels

17j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1988

Related Models

• Seiko 6621-993
• Seiko 5633-207
• Seiko 5691-599
• Seiko 6246-485
• Seiko 4566-373
• Seiko 5275-298
• Seiko 5618-170
• Seiko 5616-807
• Seiko 5223-531
• Seiko 6637-137
• Seiko 4586-513
• Seiko 5652-734