Seiko Cal. 6663 - 906

The 6663-906 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-e318c77ba05b]

Also known as: Rally, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1973

Related Models

• Seiko 3858-187
• Seiko 4446-280
• Seiko 6215-613
• Seiko 4415-816
• Seiko 5697-387
• Seiko 6371-617
• Seiko 4430-271
• Seiko 4586-940
• Seiko 3812-401
• Seiko 3842-409
• Seiko 6642-395
• Seiko 5637-726