Seiko Cal. 6377 - 180

Released in 1981, the Cal. 6377 with design code 180 was part of Seiko's domestic market collection. With its 20mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-c4c5eb52cadd]

Also known as: Sumo, World Timer

Specifications

Movement

Solar

Case Material

Titanium

Case Width

42mm

Case Thickness

11.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

White

Jewels

21j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1981

Related Models

• Seiko 5687-399
• Seiko 6178-417
• Seiko 3832-226
• Seiko 7142-724
• Seiko 5621-579
• Seiko 6285-116
• Seiko 5267-727
• Seiko 6615-744
• Seiko 5231-742
• Seiko 6258-698
• Seiko 5653-683
• Seiko 4475-871