Seiko Cal. 4538 - 991

The Seiko 4538-991 represents an important milestone in Seiko's 1997 lineup. It features a Cream dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-09a341f0e228]

Also known as: Sumo, Bullhead

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

19j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1997

Related Models

• Seiko 4585-262
• Seiko 5693-489
• Seiko 4541-106
• Seiko 0762-504
• Seiko 5613-598
• Seiko 6242-880
• Seiko 5654-140
• Seiko 4575-555
• Seiko 7157-963
• Seiko 7097-480
• Seiko 5271-459
• Seiko 7048-552