Seiko Cal. 4451 - 556

The Seiko 4451-556 represents an important milestone in Seiko's 1974 lineup. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-d340a49174df]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

12.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1974

Related Models

• Seiko 6664-456
• Seiko 6144-415
• Seiko 6364-786
• Seiko 6233-802
• Seiko 6180-278
• Seiko 5262-304
• Seiko 7142-610
• Seiko 6167-734
• Seiko 6158-469
• Seiko 7064-512
• Seiko 5631-957
• Seiko 6217-965