Did they run out into a busy shopping street in robber fancy dress afterwards?

Video from Greater Manchester Police's YouTube channel, text from there too:

Watches worth an estimated £1m were stolen during a robbery in Manchester city centre.

Shortly
after 7.20pm on Wednesday 19 September 2012, three masked men, who were
wearing high visibility jackets and trousers, entered Selfridges on
Exchange Square.

The offenders smashed display cabinets using an axe and crowbars and stole approximately 100 watches.

They
escaped in a Black Mercedes Benz driven by a fourth offender. The car
was found abandoned Robert Street, Strangeways, a short time later.

Watches including Audermars Piguet, Jaeger le Coultre, Hublot and Cartier were stolen.

Detective
Constable Adam Cronshaw, said: "This was a brazen robbery while the
store was open and busy with members of the public.

"It was
clearly well planned and executed. These men were in and out in less
than 80 seconds and were very particular about the watches they
selected.

"I am appealing for anyone who knows who is
responsible or has overhead someone talking about this robbery - either
before or after it happened - to contact us in absolute confidence.

"The
clothing worn appears to be brand new and I am also eager to hear from
anyone who knows where they may have been purchased or manufactured.

"The
offenders will, at some point, undoubtedly look to off load these
watches and I would urge people to be mindful of this robbery and again
if anyone is approached with a view to buying any of these items to
please contact us."

Anyone with information is asked to call police on 0161 856 3240, or Crimestoppers, anonymously, on 0800 555 111.