A gang of thieves raided an industrial unit and made off with a haul of goods including two antelope heads.
Police said the attack on the premises at Water-ma-Trout Industrial Estate, Helston, happened sometime between the evening of December 21 and Thursday 27.
The kudu and eland hunting trophies were snatched along with cash, mobile phones, laptop, TVs, cameras and charity boxes.
Eric Nicholls, 48, from near Helston, who owns the trophies, said he believed they may have been stolen to order.
He said: "I brought the two pieces back from a hunting trip to South Africa in 2003. They are of huge sentimental value and a probably worth around £1,000 each.
"They're quite large – the kudu has horns measuring 60 inches in length. It would have taken a few people to shift all the items into a vehicle larger than a car – perhaps a van."
Mr Nicolls is offering a reward for information leading to the recovery of the goods and prosecution of the culprits.
He said: "If the trophies were not stolen to order it's possible the thieves will try to sell them to anyone they can."
A police spokesman said: "I would urge anyone who saw anything suspicious during the relevant period to contact us immediately."