At around 10.30pm on Wednesday 21 October, a man took the PDQ card payment machine from the front counter of the Old Bank Hotel on High Street.
Police believe the man in this image may have vital information that could help with their investigation.
Investigating officer Detective Constable Lee Dix, based at St Aldates police station said: “If you recognise this man, or believe it could be you, please get in touch.
“Likewise if you witnessed this incident or have any information, we would like to hear from you.
“You can make a report online or by calling 101 and quoting reference 43200336927.