An ammonite (Eopachydiscus sp.) is up for sale at public auction on Nov. 19, 2013: http://images2.bonhams.com/original?src=Images/live/2013-10/23/S-21076-0-1.pdf This specimen (Lot # 1067) is 5'-6" wide and about 4'-0" high!
Any bets on the final price?
Any bets on the final price?