Lambton OPP say antique guns and ammunition were among the items stolen in a daytime break and enter in the 2000-block of Plank Rd. in St. Clair Township Thursday.
Police say they were taken from a residence sometime between 10am and 1pm.
The items are described as a black Eibar Revolver .455 calibre pistol from 1914, 50 rounds of Colt Dominion .455 calibre ammunition, and a brown Cooey single shot 12 gauge shotgun from the 1930's or 40's.
The investigation continues with help from the OPP's Forensic Identification Service, and Street Crime Unit.
Anyone with information is asked to call Lambton OPP or Crime Stoppers.