Seiko Cal. 5681 - 618

Released in 1990, the Cal. 5681 with design code 618 was part of Seiko's domestic market collection. The Inner Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-5419a99af2ee]

Also known as: Bullhead, UFO

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

38mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

32j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1990

Related Models

• Seiko 7127-364
• Seiko 5276-738
• Seiko 6376-645
• Seiko 6329-540
• Seiko 4587-243
• Seiko 5678-669
• Seiko 7194-928
• Seiko 4590-750
• Seiko 6240-640
• Seiko 7055-747
• Seiko 7141-821
• Seiko 5260-986