Seiko Cal. 6387 - 230

Released in 1977, the Cal. 6387 with design code 230 was part of Seiko's domestic market collection. The Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-86f06ae76fb6]

Also known as: Helmet, UFO

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

14.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

180m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1977

Related Models

• Seiko 7063-930
• Seiko 6629-876
• Seiko 6127-246
• Seiko 4584-488
• Seiko 4442-770
• Seiko 3884-144
• Seiko 6617-312
• Seiko 4563-850
• Seiko 5647-803
• Seiko 6112-129
• Seiko 4471-750
• Seiko 0779-749