Seiko Cal. 6661 - 999

Released in 1971, the Cal. 6661 with design code 999 was part of Seiko's domestic market collection. It features a Navy dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-f4bb38af2f54]

Also known as: Silverwave

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

32j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1971

Related Models

• Seiko 4435-251
• Seiko 7172-365
• Seiko 5248-286
• Seiko 0787-507
• Seiko 7040-925
• Seiko 5236-779
• Seiko 4451-804
• Seiko 3885-552
• Seiko 6275-999
• Seiko 6219-279
• Seiko 0720-253
• Seiko 5690-359