Seiko Cal. 4438 - 222

The Seiko 4438-222 represents an important milestone in Seiko's 1988 lineup. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-4e0eca0bb82a]

Also known as: Tuna, Helmet

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

32j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1988

Related Models

• Seiko 0752-751
• Seiko 4443-910
• Seiko 5275-224
• Seiko 6618-269
• Seiko 4420-489
• Seiko 4586-709
• Seiko 6367-277
• Seiko 0763-723
• Seiko 7163-423
• Seiko 4553-798
• Seiko 6235-331
• Seiko 6273-570