[OT] Film reel lead-in?

["Rob Lamb" <those@xxxxxxxxxxxxxx>]

I know a few people have some add on bits for their home cinema set
up so I am hoping someone will have a clip of the lead in that you
used to see on old movies (and perhaps new ones?) that has a
countdown of numbers in a sweeping circle (hope I've explained that
well enough!), and an audio track of the flickering sound the
projector makes?

Thanks in advance,

Rob