Seiko Cal. 4439 - 311

This Spring Drive model from 1979 features a 44mm Gold-Plated case. With its 21mm lug width and 8.4mm profile, it sits comfortably on most wrists. [seikata-wm-45172792d051]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

8.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1979

Related Models

• Seiko 5210-365
• Seiko 4542-518
• Seiko 7194-640
• Seiko 7069-969
• Seiko 6145-974
• Seiko 6189-133
• Seiko 5682-335
• Seiko 6382-190
• Seiko 3892-311
• Seiko 6246-944
• Seiko 4577-524
• Seiko 7064-326