Seiko Cal. 6643 - 763

Seiko 6643-763

The 6643-763 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6643 caliber with 31j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-aa849679148e]

Also known as: Baby Tuna

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
38mm
Case Thickness
14.7mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
200m
Dial Color
White
Jewels
31j
Frequency
28,800 bph
Power Reserve
61 hours
Year
1980

Related Models

seikata-wm-aa849679148e