Seiko Cal. 4490 - 840

The Seiko 4490-840 represents an important milestone in Seiko's 1975 lineup. With its 20mm lug width and 12.3mm profile, it sits comfortably on most wrists. [seikata-wm-09e2db62afaa]

Also known as: Monster, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1975

Related Models

• Seiko 7075-953
• Seiko 6159-354
• Seiko 6623-834
• Seiko 5256-147
• Seiko 5687-911
• Seiko 0767-177
• Seiko 6118-109
• Seiko 7060-857
• Seiko 5662-466
• Seiko 6661-204
• Seiko 5615-814
• Seiko 5251-527