Quick Summary
After a busy end to 2025, there's another rare Patek Philippe going up for auction.
This Ref. 2523 configuration is believed to be one of just two in existence.
At the tail end of last year, we saw three incredibly rare Patek Philippe 1518 models go under the hammer in Switzerland. That included the steel 1518, which is one of just four known to exist, making it one of the rarest watches out there.
