A reward has been offered to find a second suspect
The hunt for an armed robber and £6m of stolen jewellery has been stepped up following the discovery of the intended getaway vehicle.
The silver and black Piaggio scooter was found shortly after a robbery at Graff jewellers on New Bond Street, west London, last Tuesday.
Forty seven items of diamond jewellery, worth an estimated £6m were stolen and are still missing.
The scooter was left in a nearby street and officers believe it would have been used as the getaway vehicle had everything gone to plan.
Now detectives are asking landlords and hotel managers if they saw it parked on their property in the weeks before the heist.
They know it was bought at the beginning of May in west London.
Detective Inspector Andy Dunn said: "We need to know where this scooter has been kept before we found it last Tuesday. I believe it will have been somewhere in the west London area."
Graff is world renowned and is a favourite with celebrities such as boxer Mike Tyson and supermodel Naomi Campbell.
Forty seven items of diamond jewellery were stolen
On Friday its insurers put up a £150,000 reward for information leading to the recovery of the missing gems and the arrest and conviction of the thieves.
Mr Dunn added: "The 47 items stolen are all marked as part of Graffs' own security measures that will make them very hard to sell on in legitimate markets.
"Our hunt to recover the property will be focused world wide as it is possible the jewellery may be sold on abroad."
Police have charged 33-year-old Serbian national Nebojsa Denic with theft and possession of a firearm - he appeared at Bow Street Magistrates Court last Thursday.
They are searching for another suspect, described as a white man, 5 ft 7 in tall of skinny build with short brown hair and a thin nose.