Seiko Cal. 4550 - 747

The 4550-747 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4550 caliber with 23j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-87e3acd422c0]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

46mm

Case Thickness

11.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

200m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1977

Related Models

• Seiko 3812-898
• Seiko 7141-234
• Seiko 5253-736
• Seiko 6141-142
• Seiko 7178-401
• Seiko 5684-209
• Seiko 6241-580
• Seiko 4462-634
• Seiko 3819-313
• Seiko 5221-808
• Seiko 5611-405
• Seiko 5236-248