Seiko Cal. 6661 - 763

The 6661-763 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6661 caliber with 24j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-e9daf5d4e8a5]

Also known as: Goldfeather

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

160m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1968

Related Models

• Seiko 6660-341
• Seiko 3851-339
• Seiko 6159-310
• Seiko 6216-883
• Seiko 4414-863
• Seiko 4415-391
• Seiko 0726-126
• Seiko 3874-624
• Seiko 3898-729
• Seiko 7159-695
• Seiko 6133-849
• Seiko 4468-739