Sylvester Stallone's watches to go on sale, including a Patek that could fetch millions

Sylvester Stallone is sending nearly a dozen luxury watches to the auction block next month.

When the watches go up for auction, the "undisputed centerpiece" will be the Patek Philippe Reference 6300G-010 Grandmaster Chime the actor has owned for some time, according to Sotheby’s. The rare timepiece could wind up going for $2.5 million to $5 million.

The auction house will take bids on 11 watches that belong to Stallone during its upcoming Important Watches auction in New York City.