More than £400,000 worth of jewellery has been seized from the wife of a fraudulent banker as part of the UK’s first McMafia-style “dirty money” investigation.

A judge ordered the detention of 49 items of high-end jewellery connected to Zamira Hajiyeva, the wife of an Azerbaijani banker jailed for defrauding his state-owned bank out of hundreds of millions of euros. Hajiyeva, who was known only as Mrs A until an anonymity order was lifted last month, is subject to the UK’s first unexplained wealth order (UWO) under which she risks losing two properties worth £22m.

The National Crime Agency seized the items from Christie’s auction house in central London, where they had been brought to be valued by Hajiyeva’s daughter Leyla Mahmudova. The NCA said the source of funds used to purchase the jewellery, including a £120,000 Boucheron sapphire and ruby necklace, “requires further investigation”. The district judge granted the detention of the items for six months to allow further investigation and “determine whether it is recoverable”.

Some of the items were purchased by Hajiyeva’s husband Jahangir Hajiyev in the luxury Swiss ski resort of San Moritz in 2008. Hajiyev, 57, is the former chair of the state-owned International Bank of Azerbaijan. In 2016, he was sentenced to 15 years in jail for defrauding the bank.

The NCA alleges that stolen funds were used to buy an £11.5m, five-bedroom property in Knightsbridge, 100 yards from the doors of Harrods.

The court of appeal heard last month that Zamira Hajiyeva spent £16.3m on three Harrods customer loyalty reward cards over a decade. On one trip to the department store, she spent £150,000 on products from the luxury jeweller Boucheron. The NCA said she used 35 credit cards issued by her husband’s bank to fund the Harrods spending spree.

The court also heard that Hajiyeva had access to a $42m (£32m) Gulfstream G550 jet and had a wine cellar stocked with some of the world’s most expensive bottles.

The NCA claims suspect cash funded the £10.5m purchase of Mill Ride golf and country club in Ascot via a company based in Guernsey. In a high court ruling last month, Mr Justice Supperstone ordered that Hajiyeva must comply with the UWO and explain how she amassed the money used to fund the property purchases. If she is unable to prove the legitimate source of the funds, the properties could be seized.

The agency claims Hajiyeva is wanted by Azerbaijani authorities in connection with avoiding the investigation into fraud at her husband’s former bank. She is one of several family members whom the authorities claim Jahangir used to take money out of the country.

The family deny the allegations. In October, Hajiyeva’s lawyer said: “The decision of the high court upholding the grant of an [UWO] against Zamira Hajiyeva does not and should not be taken to imply any wrongdoing, whether on her part or that of her husband. The NCA’s case is that the UWO is part of an investigative process, not a criminal procedure, and it does not involve the finding of any criminal offence.”