Hi Sheila, Lovely coat and a great deal too.
The trim is indeed Chinchilla fur.
I believe the body of the coat is American processed broadtail lamb which starts out as an older type of lamb such as Persian, Astrakhan, or Karakul whick all have a distinctive tight close curl but are from different regions. The lamb is then sheared close to the skin to give the distinctive moiré pattern that natural broadtail has. Yours would have been dyed as well to make it black. I also actually think I can see stamping on the skin portion of your coat which says PROCESSED IN USA which would further confirm this.