Seiko Cal. 6643 - 510

This Solar model from 1974 features a 46mm Two-Tone case. With its 20mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-4d5a6f58389f]

Also known as: Golden Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

46mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Navy

Jewels

32j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1974

Related Models

• Seiko 6329-357
• Seiko 3841-133
• Seiko 5243-944
• Seiko 7077-813
• Seiko 7141-156
• Seiko 6297-841
• Seiko 5271-308
• Seiko 4534-350
• Seiko 6267-322
• Seiko 6398-855
• Seiko 0790-493
• Seiko 6368-409