Seiko Cal. 6378 - 677

The Seiko 6378-677 represents an important milestone in Seiko's 1965 lineup. The Fixed bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-f55d1d486e1e]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1965

Related Models

• Seiko 6190-239
• Seiko 7065-647
• Seiko 6671-960
• Seiko 4457-324
• Seiko 0783-489
• Seiko 3835-694
• Seiko 3811-486
• Seiko 0718-575
• Seiko 7021-787
• Seiko 6610-487
• Seiko 6195-177
• Seiko 6310-369