Seiko Cal. 4577 - 991

The Seiko 4577-991 represents an important milestone in Seiko's 1985 lineup. Powered by the 4577 caliber with 32j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-4061e70ceb22]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Green

Jewels

32j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1985

Related Models

• Seiko 4417-990
• Seiko 5290-761
• Seiko 6240-686
• Seiko 4429-805
• Seiko 3812-685
• Seiko 7149-280
• Seiko 6266-436
• Seiko 4583-693
• Seiko 5655-224
• Seiko 5262-984
• Seiko 5239-414
• Seiko 3815-873