Ref. 725: The Essence of a Patek Philippe Perpetual Calendar
The ref. 725 Perpetual Calendar is where it all began – the entire lineage of the references 1518, 2499, 3970, 5970, 5270 can be traced back to the dial design of that model. The DNA of the ref. 725 can be seen in the position of the moonphase and subsidiary dials on numerous Patek Philippe … Continued