Seiko Cal. 6639 - 988

Seiko 6639-988

The 6639-988 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6639 caliber with 23j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-8f524a810500]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
35mm
Case Thickness
14.9mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
50m
Dial Color
Blue Sunburst
Jewels
23j
Frequency
36,000 bph
Power Reserve
53 hours
Year
1970

Related Models

seikata-wm-8f524a810500