Detectives want to speak to the man pictured about an aggravated burglary in which the victim was struck several times with a hammer.
A 48-year-old man was at home in Hatfields, Loughton, when his doorbell rang at 5.05pm on Thursday September 1.
When he answered the door, a man demanded money and assaulted the victim, causing cuts and bruises to his head and arms.
Police want to identify the man pictured. Anyone who recognises him is asked to call Pc Rob Guiney at Loughton CID on 101.
Alternatively, they can contact Crimestoppers anonymously on 0800 555111 or www.crimestoppers-uk.org.