All coins in this catalogue are most likely exempt from any US import tariffs, as they have been exported from the United States within the last 3 years and should be able to be returned under HTSUS subheading 9801.00.10. We have consulted a leading U.S. law firm specialised in International Trade who confirmed that in principle this is possible, but highlighting the lack of rulings in the specific context collectable coins sold at auction. Hopefully, we will have some clarity by the time of the auction. Should you have any questions in the meantime, please do not hesitate to contact one of our offices.