a new topic on a quiet uncommon watch : the Seamaster Megasonic :
you probably all know the "accutron" technology with tuning fork : the inventor of this technology is Max Hetzel, born in Bale in 1921, he started his career in the Zurich university and make his firt patent during this period
he started his career in the watch industry at Bulova in 1950, Mr Hetzel was in charge of the accutron program and makes 20 patents on the topic. In 1959 he was chief of the R&D at Bulova
Max quit Bulova in 1963 for the R&D lab of Neuchatel where he devolop Swiss Sonic (4 patents)
he is hired in 1969 as chairman of Elresor SA, a subsidiary of Omega where he is in charge of the Megasonic program (10 patents) : the funny thing is that Max was in charge of trying to find a solution to ... bypass the Bulova patents !
The Megasonic use a microengine : "the mouse" : it is not connected physically to the grear train but use magnetic field to move the gear train
The electronic circuit is different it use only one coil with an assymetric fork, the micro wheel (see it in the video) is only 1,2 mm and it is caged in a small grearbox fill with oil
Frequency is 720 Hz, more than double compared with the accutron and therefore more precise : megasonic are officially certified chronometers
introduced in 1972 the Megasonic was a short live technology : stopped in 1975 because of quartz precision : simplier and more acurate
only 43.000 watches where produced, some very rare exemples still works today : they are VERY difficult to service
detail of "the mouse"
a video dedicated on this great Omega technology