Seiko Cal. 4581 - 340

The 4581-340 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4581 caliber with 27j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-4b0837cd181a]

Also known as: Sumo, Crown

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Silver

Jewels

27j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1978

Related Models

• Seiko 7118-169
• Seiko 6673-334
• Seiko 3813-558
• Seiko 6266-468
• Seiko 3871-542
• Seiko 7096-475
• Seiko 6253-524
• Seiko 6125-818
• Seiko 7058-459
• Seiko 7195-853
• Seiko 6198-277
• Seiko 6694-745