Yolanda Schicker-Siber on Tuesday was gingerly fastening a pointy claw bone with a thin metal wire, putting the finishing touches on a giant Tyrannosaurus rex skeleton before a rare auction in Switzerland next month.
The Aathal Dinosaur Museum’s curator was helping complete perhaps the world’s biggest construction kit — reassembling a T-rex dubbed Trinity.
Trinity was sent to Zurich from Arizona in nine giant crates.
Photo: AFP
The 3.9m skeleton has been mounted on a red carpet and under crystal chandeliers in a Zurich concert hall, where it is on public display before going under the hammer on April 18.
The Koller auction house has estimated it would fetch 6 million to 8 million Swiss francs (US$6.5 million to US$8.7 million).
However, Christian Link, who is in charge of natural history memorabilia at Koller, said he believed that was a “pretty low” estimate.
Photo: AFP
Trinity is made up of bone material from three T-rex specimens excavated between 2008 and 2013 from the Hell Creek and Lance Creek formations in Montana and Wyoming.
The two sites are known for the discoveries of two other significant T-rex skeletons that have gone to auction. Sue went under the hammer in 1997 for US$8.4 million and Stan took the world-record hammer price of US$31.8 million at Christie’s in 2020.
Last year, Christie’s withdrew another T-rex skeleton days before it went on sale in Hong Kong after doubts were reportedly raised about parts of it.
Reassembling Trinity was no easy feat, Schicker-Siber told reporters as she secured another toe bone.
“The bones are very, very old. They are 67 million years old. So they are brittle, they have cracks,” she said. “They are stabilized, but you never know if there is a crack that you haven’t seen so far... You have to have the glue ready.”
Aart Walen, an exhibit preparator from the Netherlands with 30 years’ experience assembling dinosaur skeletons, agreed.
“We didn’t break anything yet,” he said as he and his colleagues worked on two large ischium bones, which sat near the dinosaur’s pelvic area where the eggs came out.
With a parakeet named Ethel perched on his shoulder, Walen filled in cracks in the bones using what looked like dental tools and modelling compound.
It was important for the repair work to remain visible, he said, showing the dark lines where the fissures had been filled.
“You have to see where it has been repaired. There are some stories about fakes out there. We don’t want that,” he said, referring to the aborted Christie’s auction.
Knocking on different parts of the bone, he also demonstrated the different sounds made on original bone and the plastic additions used to fill out the skeleton.
Just over half of the bone material in the skeleton comes from the three T-rex specimens — above the 50 percent level needed to consider such a skeleton high quality.
Link said that Koller was intent on being open and transparent about the origins of the bones that make up Trinity.
“Hence the name Trinity. We are not hiding in any way that this specimen comes from three different dig sites,” he said.
The skeleton is being sold by a “private individual” who wants to remain anonymous.
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