Seiko Cal. 6389 - 870

The Seiko 6389-870 represents an important milestone in Seiko's 1979 lineup. With its 18mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-6644efea5ad6]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1979

Related Models

• Seiko 7070-922
• Seiko 3863-361
• Seiko 4423-116
• Seiko 6327-311
• Seiko 5659-286
• Seiko 6146-465
• Seiko 4565-518
• Seiko 7084-483
• Seiko 7031-716
• Seiko 4565-232
• Seiko 4516-817
• Seiko 6163-446