Seiko Cal. 6643 - 178

The 6643-178 is a sought-after Solar piece from Seiko's golden era. It features a Navy dial protected by a Acrylic crystal and offers 140m of water resistance. [seikata-wm-55ab716d4764]

Also known as: Turtle, Emperor

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Navy

Jewels

22j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1988

Related Models

• Seiko 3884-994
• Seiko 4481-528
• Seiko 5247-455
• Seiko 0762-320
• Seiko 5645-272
• Seiko 0754-489
• Seiko 0765-271
• Seiko 0753-224
• Seiko 6127-818
• Seiko 4440-696
• Seiko 6280-526
• Seiko 5229-582