Google is your friend -- https://tunebat.com/Info/The-Blue-Cafe-Chris-Rea/2CvyDY52IoJaLZ5vbKcTd4
The Blue Cafe by Chris Rea is in the key of D Minor If you go online and find a harmonica position chart, you will find that you will use a G harmonica for 2nd position [D harmonica for first position, or C harmonica for 3rd position]
Yes , I already lost money because first I purchased Hohner D natural minor and then I got the same minor from Lee oskar because I did not know Lee oskar does the labeling differently :) It is painful :) I have two of the same key now.