Seiko Cal. 6390 - 608

The 6390-608 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6390 caliber with 20j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-c1eb155b8b56]

Also known as: Helmet, Navigator

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1989

Related Models

• Seiko 6274-207
• Seiko 6322-992
• Seiko 6320-480
• Seiko 6382-703
• Seiko 7052-666
• Seiko 6619-951
• Seiko 3861-706
• Seiko 6111-944
• Seiko 5265-391
• Seiko 4412-337
• Seiko 3847-144
• Seiko 4447-464