Seiko Cal. 5643 - 764

This Spring Drive model from 1987 features a 40mm Gold-Plated case. It features a Silver dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-25d95631f1ec]

Also known as: Tuna, Rally

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

9.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1987

Related Models

• Seiko 6299-867
• Seiko 7081-474
• Seiko 6343-202
• Seiko 6149-318
• Seiko 0749-633
• Seiko 6192-911
• Seiko 7154-603
• Seiko 6371-258
• Seiko 7036-214
• Seiko 7136-966
• Seiko 6613-862
• Seiko 7057-581