Ebauches SA (ESA / ETA) was not only the most important participant in Beta21 joint-venture but also is one of the most relevant movement-producers, nowadays. And it is amazing to see: "From First to Thinnest" in exactly 10 Years: Swiss Quartz started with Beta21 ESA-Quartz in Apr-1970 and reached perfection in the category miniaturization in Jan-1980 with the ESA / ETA cal999 Delirium Tres Mince in the 1.68mm-ladies version Delirium III.

As you know we see only two relevant categories in quartz: miniaturization and precision -- both were reached in the 70s / early 80s, already.

Now, thats an interesting high-speed development. And so we understand this speed is not for everyone: If your comfort zone is 3Hz and you become nervous at 4Hz-Mechanical-Movements, already, then 300Hz Tuningfork-Movements simply arent healthy for you and 32'768Hz Quartz probably really dangerous. For all others: There is a lot to see in the sphere of electronic watches 1961ff.