Seiko Cal. 6639 - 783

The 6639-783 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6639 caliber with 24j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-db122dc0baa8]

Also known as: Tuna, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

13.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Black

Jewels

24j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1978

Related Models

• Seiko 3883-162
• Seiko 4599-463
• Seiko 7173-611
• Seiko 3810-618
• Seiko 4544-164
• Seiko 0729-132
• Seiko 5664-224
• Seiko 4562-788
• Seiko 6396-963
• Seiko 7068-792
• Seiko 6231-146
• Seiko 6625-929