Seiko Cal. 6320 - 640

This Hand-Winding model from 1975 features a 37mm PVD Black case. It features a Navy dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-f0172e7f9eaa]

Also known as: Navigator, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1975

Related Models

• Seiko 5610-504
• Seiko 4426-251
• Seiko 7034-986
• Seiko 7179-885
• Seiko 0714-215
• Seiko 6264-557
• Seiko 7088-829
• Seiko 5612-420
• Seiko 4517-614
• Seiko 4592-822
• Seiko 6312-691
• Seiko 4410-295