This is information from one who is no longer with us, he was a wealth of information, WD Foster.
1947-48 Chevy the brown back ground is a little grayer. the letters are white the needles are painted red and short. 212 temp gauge and 80mph speedo
1949-51 Chev the background changed to a different shade of brown, the needles are painted white and longer than the 47-48
1952-53 Speedo changed to 90mph and temp gauge increased to 220
