Here's a clean standard instrument cluster for the 1966 Mustang.
Lens shine is good and will improve more with some plastic polish.
Bezel has 'patina' but is perfectly suited for driver car or those appreciating 'patina'
Back is clean.   Back of cluster has part # C6ZF-10843. There are pencil marks of wire colors from years ago.
Fuel/Oil/Temp gauges have been TESTED and work.  Amp gauge has NOT been tested.   Speedo needle moves freely.  Orange is bright on needles.  Faces of gauges look clean,

Good piece for your fastback/hardtop/or convertible