Seiko Cal. 4576 - 977

The 4576-977 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4576 caliber with 21j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-346d288612b9]

Also known as: Tuna, UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Cream

Jewels

21j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1980

Related Models

• Seiko 6662-300
• Seiko 6273-347
• Seiko 0723-346
• Seiko 5279-642
• Seiko 6319-483
• Seiko 7120-540
• Seiko 4418-806
• Seiko 5627-852
• Seiko 6167-273
• Seiko 6197-627
• Seiko 4422-586
• Seiko 3894-700