Seiko Cal. 5240 - 428

This Spring Drive model from 1975 features a 43mm PVD Black case. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-89499d716297]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

15.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1975

Related Models

• Seiko 4410-898
• Seiko 6231-708
• Seiko 5617-101
• Seiko 5695-454
• Seiko 6358-669
• Seiko 6129-159
• Seiko 4541-511
• Seiko 4586-421
• Seiko 0752-742
• Seiko 5289-242
• Seiko 3896-802
• Seiko 6622-490