The suspects ploughed a van into the entrance of the Sloane Avenue retailer in the early hours of Friday.
Accomplices on mopeds then stole jewelry from the store.
The raiders fled, whereas the van was left at the scene.
Police had been known as simply earlier than 3am. No arrests have been made.
Footage from the scene on Friday morning confirmed a smashed show desk inside the shop.
Officers remained at the scene, with the entrance window nonetheless hanging in its body.
A lot of footprints had been additionally seen on the pavement.
The Met is interesting for data, urging individuals to name 101 – quoting reference CAD 0671 of April 26 – or Crimestoppers anonymously on 0800 555 111.
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