Seiko Cal. 6391 - 920

The 6391-920 is a sought-after Automatic piece from Seiko's golden era. With its 20mm lug width and 12.4mm profile, it sits comfortably on most wrists. [seikata-wm-9faa2e397ce8]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

170m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1975

Related Models

• Seiko 4558-362
• Seiko 7031-414
• Seiko 5241-970
• Seiko 5235-656
• Seiko 6637-297
• Seiko 7027-211
• Seiko 6162-839
• Seiko 7187-286
• Seiko 6374-383
• Seiko 3842-369
• Seiko 6159-165
• Seiko 7072-789