Seiko Cal. 4556 - 510

Released in 1968, the Cal. 4556 with design code 510 was part of Seiko's domestic market collection. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-4ff2482ee3dc]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

150m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1968

Related Models

• Seiko 0721-555
• Seiko 4460-394
• Seiko 4433-436
• Seiko 3818-548
• Seiko 3819-870
• Seiko 7189-560
• Seiko 0785-408
• Seiko 5250-674
• Seiko 6238-758
• Seiko 3874-142
• Seiko 6386-523
• Seiko 6612-642