Seiko Cal. 6648 - 698

This Hand-Winding model from 1990 features a 37mm PVD Black case. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 50m of water resistance. [seikata-wm-76dc7bd028b2]

Also known as: Navigator, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1990

Related Models

• Seiko 5280-616
• Seiko 6348-136
• Seiko 5637-774
• Seiko 4540-464
• Seiko 6322-712
• Seiko 0787-837
• Seiko 7052-856
• Seiko 5265-249
• Seiko 6162-623
• Seiko 6289-997
• Seiko 6210-614
• Seiko 6394-124