Seiko Cal. 6640 - 323

The 6640-323 is a sought-after Automatic piece from Seiko's golden era. It features a White dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-444b776accb2]

Also known as: Goldfeather, Navigator

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

White

Jewels

21j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1977

Related Models

• Seiko 4568-309
• Seiko 5667-334
• Seiko 7023-205
• Seiko 4454-173
• Seiko 6664-861
• Seiko 7064-325
• Seiko 4420-603
• Seiko 6136-458
• Seiko 5611-555
• Seiko 6366-289
• Seiko 6641-656
• Seiko 6252-464