It's like new, though the grips have taken some battering from it having been carried a lot. Unless I'm mistaken, these guns were all carried in full flap holsters, so only the grips would be open to damage from bumps and dings. I'll get pictures later today.
C&E definitely stands for Customs & Export, and I'm assuming that the number is a stock number assigned by the agency. I was told that this was a Hong Kong police revolver by the guy who bought it from the wholesaler; I'll call him or go by his shop later in the day to see if he can shed any light. I don't have the current Standard Catalog, though I do have access to it. I just didn't try to look this one up.
I think we are talking about two different police agencies here, but each using the same configuration in the M & P, lanyard ring, etc. Both made around the same time. Both interesting, somewhat collectible, both same high quality. Enjoy, Leland! Regards, G>M>F>
PS: C&E stands for Customs & Excise.
Nothing more authoritative than a S & W letter signed by Roy Jinks, but it means a further investment of $30. Well worth it to me on a few items in the past, but I speak only for myself. Regards, G>M>F>
Nifty gun. You might contact Collector's Firearms in Houston about the holster and lanyard. They have several H&K M10s in stock. They also have a lot of antique gear, so it's a possibility. www.collectorsfirearms.com.
As far as Hong Kong is concerned, Supica mentions only a special version for the Royal Hong Kong Police, stamped RHKP. The book indicates that the list is partial since so many versions have been made.