An antique war pistol and a hundred-year-old pendant were stolen after thieves forced their way into a house in Windy Arbour last week.
A silver chain and pendant with an inscription to commemorate the royal visit to HMS Ophir in 1901 was one of the items stolen in the break-in on Thursday.
Police are now trying to track down the thieves who also stole an antique Boer War pistol, rings and a brooch during the daytime raid on the home.
Officers are making a plea for information to help return the items or track down those responsible.
A police spokesperson said: “Warwickshire Police is appealing to the Kenilworth community for information following a burglary at a home on Windy Arbour on Thursday 5 February.
“The burglary happened between 1.15pm and 9.15pm when the offender or offenders forced entry to the home.”
Anyone with any information should contact DS Iain Shearer on 101, quoting incident number 0358 of 5 February 2015.
Officers have since refreshed warnings for residents to be aware of thieves and secure their homes.
Advice includes to fit door chains, keep all doors - including patio - and windows locked overnight and to use good quality alarm systems.
Officers advise against leaving spare keys near your home or outside the house, to set lights on a timer to give the impression someone is at home if you go away, and to watch out for suspicious activity in neighbouring properties.
For more advice go to the police website at onlinenews.warwickshire.police.uk