An undisclosed buyer has purchased a prized 1936 Bugatti 57SC Atlantic belonging to the late car collector Dr. Peter D. Williamson for between $30 and $40 million, The Wall Street Journal reports.

The figure, supplied by a person familiar with last week's transaction, would make the Williamson Atlantic - a heartbreaking piece of European automotive sculpture, considered the epitome of French Deco styling - the most valuable car known to have changed hands.