A moped mugger accused of murdering a man for his £7,000 Rolex researched gold watches online hours before the attack, a court heard.
Danny Pearce, 31, was stabbed and shot at on King William Walk on July 15, 2017 after refusing to hand over his watch by two men on a moped.
He was killed while walking home with girlfriend Stephanie Holland after a night out at Oliver's Jazz Club in Greenwich, southeast London.
Jordan Bailey-Mascoll, 28, has already been convicted of murder while David Egan, 24, is now on trial for the killing at Inner London Crown Court.
Prosecutor Sarah Przybylska said Egan was up in the early hours of 15 July looking up Rolex watches on the internet.
Danny Pearce, 31, (left) was with his girlfriend Stephanie Holland (right) after a night out at Oliver's Jazz Club in Greenwich, southeast London, when he was attacked
She said: 'Searches on the web: ''how to tell if Rolex is white gold'', the date being 15 July 2017, at 3:04am.
'Searches of ''Rolex Gold markings'' again 15 July.
'We see the time, it was 3:09. Again, Google search, ''Rolex Gold Markings'', now in the afternoon of the 15 July.'
Egan then used a handset he purchased on the day of the attack to message a man called 'Farid' on Facebook, who worked at a jewellers in Lewisham, the court heard.
Danny and his girlfriend Stephanie. The pair had been dating for a year
A day earlier, on 14 July, Bailey-Mascoll called Winstons Jewellers in Bromley, who would later purchase the victim's Oyster Rolex watch for around £8,500.
Ms Przybylska said: 'If we look here we can see contact, there is a Facebook message to Farid, which you'd remember... a contact at the Lewisham jewellers.'
Jurors heard Egan conducted a number of searches for 'Zombie knife' and 'How to take a bracelet off a Rolex' days after Mr Pearce was killed.
Mr Pearce's £7,000 Rolex
Web history also showed newspaper reports about a moped robbery accessed by Egan on 24 January 2017.
Reading the log of search results Ms Przybylska said: 'Zombie knife and then searches to do with Cartier watches.
'On 28 July, another search to do with a Rolex.
' ''How to take bracelet off Rolex'', results to do with that on 3 August 2017.'
Mr Pearce and his girlfriend were confronted by the two killers wearing crash helmets and balaclavas, the court has heard.
'One of them had a pistol in his hand, described as an old fashioned revolver,' said prosecutor Louis Malby.
'The other one had a knife in his hand and in Stephanie Holland's view it was curved.'
The men shouted ''Give me your watch'' at Mr Pearce as they brandished the weapons.
'Stephanie shouted, ''Run!'' and ran back towards Nevada Street. As she was running down the street she heard shots fired.
'They were real bullets that were being fired.'
Mr Pearce was chased up and down the road before Bailey-Mascoll stabbed him beside a parked car.
Egan then cornered him on the front steps of a flat where he was knifed again, the court has heard.
The men pulled off Mr Pearce's watch as Ms Holland ran back towards her boyfriend.
Mr Pearce was dragged into the flat but nothing could be done to save him.
Egan, of Deptford, southeast London, denies murder, three counts of robbery and two of possession of an offensive weapon.
He also denies possessing a gun in a public place, and possessing an imitation firearm with intent to commit an indictable offence.
The trial continues.