Seiko Cal. 4550 - 400

The Seiko 4550-400 represents an important milestone in Seiko's 1977 lineup. Powered by the 4550 caliber with 25j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-6ce07c0b43f0]

Also known as: Silverwave, Golden Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1977

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