As I found it hard to believe that anyone with even a passing interest in WW2 tech would ask if Smoke dischargers were only fitted to Tigers, I presumed the query might have been directed towards less obvious/unusual weaponry such as mines and grenades rather than those commonly fitted smoke tubes, or the strangely pleasing smoke candle devices often seen on the back of German AFV's.
I presumed wrong

.
Ah well, still finding it interesting trying to think of other 'sub weapons' mounted to ww2 vehicles.
Cheers,
Adam.