Seiko Cal. 4438 - 948

The Seiko 4438-948 represents an important milestone in Seiko's 1976 lineup. With its 19mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-8ec550cdd7ae]

Also known as: Tuna, Navigator

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Burgundy

Jewels

30j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1976

Related Models

• Seiko 3825-229
• Seiko 6116-949
• Seiko 6654-749
• Seiko 6320-626
• Seiko 5294-508
• Seiko 4515-569
• Seiko 5216-390
• Seiko 5296-579
• Seiko 5291-716
• Seiko 4564-789
• Seiko 7165-404
• Seiko 6149-252