The incident happened on Saturday 23 April 2022, in the High Street between the junctions with Commercial Road and Esplanade.
Between 8.30pm and 8.45pm, a man in his 40s is alleged to have been struck on the head by an unknown object.
The victim suffered a deep cut and was treated by paramedics before being taken to hospital for further medical attention.
Investigating officer, PC Nick Pebody, said: ‘This was an unprovoked assault that left the victim requiring a large number of stitches.
‘We have been completing enquiries in the area, including the examination of CCTV footage, and are appealing for any witnesses to call our appeal line.
‘Drivers with dashcam are also asked to check for footage that may assist our investigation.’
Anyone with information is urged to call Kent Police on 01634 792209, quoting crime reference 46/76672/22.
You can also call Crimestoppers anonymously on 0800 555111 or complete the online form on their website at www.crimestoppers-uk.org
