Seiko Cal. 5643 - 766

The 5643-766 is a sought-after Automatic piece from Seiko's golden era. It features a Navy dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-3158a0ff128a]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1988

Related Models

• Seiko 6629-724
• Seiko 6123-403
• Seiko 6161-759
• Seiko 4465-992
• Seiko 6680-499
• Seiko 7045-148
• Seiko 4515-252
• Seiko 6662-605
• Seiko 6297-135
• Seiko 6640-387
• Seiko 0746-493
• Seiko 6139-248