Transparent Cased Beta21 by Ebauches SA
Others ESA Ebauches SA Beta21
Info
ID
EG210312EPB
Brand
Others
Model
ESA Ebauches SA Beta21
Year
1970
Condition
Very good
Delivery
Watch
Movement
Type
Quartz
Caliber
ESA9173 based on Beta21
Functions
- Date
- Time (Hour, Minute, Central Second)
Case
Diameter
32mm
Thickness
11mm
Case
Plexi
Bezel
Plexi
Bracelet
Leather
Dial Color
Silver
Glass
Plexi
Sold
A rare Beta21 movement of the movement-manufacturer Ebauches SA, who was a main driver of the CEH Beta21 project, cased in a transparent 'Prototype' case. The movement works fantastic and precise and still holds the original electronics module with the initial integrated circuit, the tubed large quartz running at 8'192Hz and the hexagonal trimmer.