alphabeta81
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Think about it this way
In the art world, people want "rare and in demand" --- something unique and yet recognizable. Cy Twombly pieces, that look silly but sell for 20 30mn.
In the watch world, the super rich collectors have a lower price of admission (there are few watches 1mn plus, while there are thousands of paintings worth that). Collectors want familiar -- Rolex & Patek -- yet rare --- a line on the dial here, esoteric thing there.
So the bidding wars continue on such pieces, which is not really a reflection on all vintage or on all high end, but rather the value of a esoteric Rolex or Patek. Madness takes over and all it takes are a few rich bidders for whom 50 100 150k is all the same, all a rounding error, and up up up we go.