I bought one probably six years ago, a tapered barrel 10-7, and had a fun time gathering up the original equipment for it, flap holster, lanyard, RHKP patch, police whistle, etc.
Added bonus, the finish worn revolver turned out to be one of the most accurate handguns I've ever owned, definite keeper.
And the fact that the "Royal Hong Kong Police" were disbanded in 1997 when Hong Kong was turned over to Mainland China makes them interesting. Hong Kong Police are now "HKP" and are still armed with heavy barrel Model 10's, but with modern police holsters with retention devices, no more lanyards.
Hong Kong has the largest police force in the world, bigger than the NYPD, one police officer for every 200 or so citizens. I read somewhere they are also probably the most effective, with a crime resolution rate around 50%, if you commit any crime in Hong Kong, theft, burglary, car break in, etc, there is a good likely hood you are going to get caught.