Seiko Cal. 6390 - 778

The 6390-778 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6390 caliber with 17j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-6cfcb4526e7a]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

9.8mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

17j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1976

Related Models

• Seiko 4484-941
• Seiko 6669-174
• Seiko 6171-888
• Seiko 4427-525
• Seiko 0714-256
• Seiko 5675-839
• Seiko 0770-325
• Seiko 3852-169
• Seiko 3851-101
• Seiko 6328-802
• Seiko 3818-201
• Seiko 7031-247