A collection of valuable marine engines and other goods were stolen from a lorry parked in Heyford Park that was returning from a boat show.
Three men broke into an office to get the keys for the HGV parked on Camp Road at around 2.30am last Tuesday (September 25), according to police.
The tractor unit was found not far away but the trailer was located in the north west emptied of the 16 engines as well as stands, a marquee and merchandise.
Investigating officer PC Callum Cooper, of the Investigation Hub based at Bicester police station, said: “I would like to speak to anyone who saw any suspicious activity in the area at around the time of the burglary.
“We would also appreciate the public to contact us if they were driving in the area at the time and have dash-cam footage as this may provide vital information.”
The trio are believed to have walked from the direction of Camp Road and smashed a small window to access the office as well as moving two large, heavy cabinets.
The lorry keys were removed from a safe and the offenders walked back to the parked vehicle, driving it towards Camp Road, turning left in the direction of Ardley and Middleton Stoney.
The HGV had a red tractor unit with Barrus livery and the trailer is a large white curtain sided unit, with pictures of lawn mowers on the side (pictured).
Two vehicles, a silver Vauxhall Vectra and a white DAF HGV, are believed to have been travelling in convoy with each other, and may have been used to steal the trailer.
Of the stolen engines, there were nine Yanmar, one Mercruiser, one Mercury, one Mase, three Shire and one John Deere.
Anyone with any information about the incident should call 101 quoting the reference 43180292532 or visit www.thamesvalley.police.uk/tua/tell-us-about/cor/tell-us-about-existing-case-report.
Alternatively call the independent charity Crimestoppers anonymously on 0800 555 111.