Of course, this is first lady stop watch movement designed and manufactured by PP. But, it is for professional collector ( I suppose already have handfuls of PP, and seldom a woman would fall into this catergory ), and to me the owner of 7071 belongs to different rank of collectors.
I think its retail price also dropped from around 820k to 670k ( sort of cant remember exactly)
4936 is an annual calendar that tells u date day month and moonphase. it automatically adjust the 30 and 31of each month except for feb. however for trendy jm , who want to change watch everday would find it tedious as it is a bit difficult to adjust it once the watch has stopped moving. from this angle the worldtimer is vrry much easy to adjust as it is nothing too much to be adjusted. Must think carefully your purpose before u buy