On June 10, Sotheby’s New York will bring an impressive selection of timepieces to the auction block in for its Important Watches Including the Titanium Collection sale. Most notable among the sale’s 175 lots is the Titanium Collection, a selection of 10 previously unknown Patek Philippe timepieces accumulated by a private collector with an apparent predilection for titanium—five of the pieces feature custom titanium cases. Holding a presale high estimate of $1.5 million, the auction’s top lot is a one-of-a-ki…