Seiko Cal. 4550 - 897

The 4550-897 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4550 caliber with 23j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-2c8ebce3b35d]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

23j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1966

Related Models

• Seiko 6648-795
• Seiko 0783-835
• Seiko 5292-724
• Seiko 3845-312
• Seiko 6688-147
• Seiko 7013-874
• Seiko 6140-998
• Seiko 4585-762
• Seiko 4439-339
• Seiko 6348-131
• Seiko 4412-103
• Seiko 7018-590