from page 56 of "Watchtime", October 2006, article Power or Aesthetics, by Gisbert L. Brunner:
"... Eleven months later, Universal requested patent protection for a similar construction, the so-called Polerouter. Negotiations were successful, and Universal agreed to pay Buren a reduced license fee in the amount of four Swiss francs per movement. In 1959, the two companies co-signed a licensing contract with Complications SA. Its new self-winding caliber, which was named Piaget 12Pl ..."