The burglary happened on Bickley Road between 5.40pm and 6.25pm on December 30, 2024, when three men forced entry through a bathroom window.
Images of the stolen items, many of which are said to be unique and of great sentimental value, have now been released by police.
Detectives from the Met’s South Area Command Unit are hoping the distinctive nature of the jewellery will jog someone’s memory.
Detective Constable Jamie White said: “While the monetary value of this theft is enormous, the sentimental value is priceless – with many of the pieces being passed down through generations of the family.
“Helpfully, a number of the pieces stolen are unique, so we are hoping that releasing these photographs will jog someone’s memory.
“If you have seen these items anywhere – or know of anyone handling the goods – please do get in touch with the Met via 101, quoting 01/1257889/24.”
The suspects were captured on CCTV entering and leaving the property, but no arrests have yet been made.
Anyone who wishes to remain anonymous can contact Crimestoppers on 0800 555 111.
