World war medals were stolen during a break-in at a house in Milton Keynes last month.
A safe containing two inscribed World War One medals and four World War Two medals, which were still in their presentation boxes, were stolen between 6.40am and 4.20pm on July 28 in Cornhill, Two Mile Ash.
The safe also contained an original slavery record belonging to one of the victims’ grandfather, a British citizenship document, passports and death certificates.
Investigating officer Det Con Kathryn Combstock said: “I would like to speak to anyone who has any information about the whereabouts of these items which were of great sentimental value to the family affected.
“The victims’ had previously been burgled and had taken steps to protect their property however they have now lost items which were irreplaceable.
“I would also like to appeal to any collectors of similar items to speak to me or call Crimestoppers anonymously if they have been offered these items for sale.”
A 41-year-old man from Newport Pagnell was arrested on suspicion of burglary and was bailed until September 12.
If you have any information about where the items could be, please contact Det Con Combstock via the 24-hour Thames Valley Police enquiry centre on 101.
If you don’t want to speak directly to the police, you can contact Crimestoppers anonymously on 0800 555 111.
No personal details are taken, information is not traced or recorded and you will not go to court.