Seiko Cal. 4430 - 731

The Seiko 4430-731 represents an important milestone in Seiko's 1991 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-7fecf7ad8410]

Also known as: Turtle, Bullhead

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Navy

Jewels

24j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1991

Related Models

• Seiko 3877-191
• Seiko 7064-273
• Seiko 7017-912
• Seiko 4485-744
• Seiko 5297-907
• Seiko 4492-225
• Seiko 7160-896
• Seiko 7127-504
• Seiko 6333-916
• Seiko 5245-122
• Seiko 4448-798
• Seiko 6684-290