Seiko Cal. 6391 - 903

This Automatic model from 1971 features a 37mm Stainless Steel case. With its 18mm lug width and 9.3mm profile, it sits comfortably on most wrists. [seikata-wm-51b318dc4eca]

Also known as: Emperor

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1971

Related Models

• Seiko 7178-301
• Seiko 6186-253
• Seiko 6377-553
• Seiko 7112-464
• Seiko 3849-798
• Seiko 6697-503
• Seiko 0777-540
• Seiko 0778-444
• Seiko 5646-442
• Seiko 6210-853
• Seiko 5692-383
• Seiko 0793-127