Seiko Cal. 4556 - 256

The Seiko 4556-256 represents an important milestone in Seiko's 1969 lineup. The Coin-Edge bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-0b6340a3fc59]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Green

Jewels

24j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1969

Related Models

• Seiko 6144-341
• Seiko 7047-445
• Seiko 6322-596
• Seiko 4445-712
• Seiko 0739-434
• Seiko 4590-943
• Seiko 6271-629
• Seiko 6651-461
• Seiko 6242-640
• Seiko 0757-586
• Seiko 6319-367
• Seiko 4429-845