Only seven will be made, six for clients and one for the Patek museum.
Cool. I own a 1909 Waltham pocket watch, 19 jewels which was required for train station-master precision back in the day. Inside are engravings on many of the surfaces, some of which can only be seen if the watch is disassembled. Engravings by the watchmaker that will only ever be seen by other watchmakers.