These very rare and uncoiled ammonite are "among the most striking and remarkable natural objects known from the Cretaceous rocks of the U.S. Western Interior". The helical shape with looped tapering finial has provided much debate for palaeontologists as it would not have made an efficient swimmer, and the three different orientations of coiling would present different challenges to the mollusc living inside the shell as they changed the direction of growth.
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This lot has been imported from outside the EU for sale and placed under the Temporary Admission regime. Import VAT is payable (at 5%) on the hammer price. VAT at 20% will be added to the buyer’s premium but will not be shown separately on the invoice. Please see the Conditions of Sale for further information.

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