Seiko Cal. 4577 - 327

The 4577-327 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4577 caliber with 20j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-20915d5184e5]

Also known as: Sportsmatic, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1971

Related Models

• Seiko 6397-887
• Seiko 5633-808
• Seiko 5286-998
• Seiko 6342-867
• Seiko 0734-511
• Seiko 7083-191
• Seiko 6698-459
• Seiko 6366-666
• Seiko 6671-440
• Seiko 7140-253
• Seiko 7046-413
• Seiko 5627-239