Seiko Cal. 4556 - 257

The Seiko 4556-257 represents an important milestone in Seiko's 1978 lineup. The Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-0ac18ce223a1]

Also known as: Helmet, Flighty

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1978

Related Models

• Seiko 5231-164
• Seiko 5285-134
• Seiko 5699-186
• Seiko 6251-734
• Seiko 3857-721
• Seiko 4558-449
• Seiko 6171-927
• Seiko 5618-364
• Seiko 5680-899
• Seiko 4562-227
• Seiko 6294-985
• Seiko 7134-934