Seiko Cal. 0731 - 180

Released in 1978, the Cal. 0731 with design code 180 was part of Seiko's domestic market collection. With its 20mm lug width and 11.2mm profile, it sits comfortably on most wrists. [seikata-wm-3aee7de87833]

Also known as: Monster, World Timer

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

43mm

Case Thickness

11.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Silver

Jewels

22j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1978

Related Models

• Seiko 5616-353
• Seiko 0753-348
• Seiko 5655-812
• Seiko 4567-645
• Seiko 6124-716
• Seiko 6360-444
• Seiko 6171-143
• Seiko 6264-624
• Seiko 4587-483
• Seiko 7155-585
• Seiko 6131-244
• Seiko 0772-916