MOTHER MENSEL 1930

manufactured by AMIDA WATCHES,SWITZERLAND,cal.544
escape : of cups,Volant monometal-lic,chromate;flat spiral.
peculiarities :monta 13 synthetic rubies,5 counterpivot,you have four bridges
second to the sis serial number 1310.
Ball : platinum white of golden sticks.
Box : of gold-plated brass from 10 microns.