Papagolf,
From my 206 course (& memory)the explanation of the fins goes:
In the beginning was the 206 which had a vertical fin to provide antitorque in the cruise, offloading the tail rotor in this regime - then came the stretched version (206L) which had a longer distance from mast to tailfin, which overdid the antitorque effect in the cruise. For reasons of ease and retaining parts commonality it was easier to add opposing finlets to the tailplane ends and keep everything else the same!
Nothing official on that of course, but it sort of hangs together in the practical/beancountery sort of world we have...
Hadn't noticed the tailplane ends longer on one side though...
Hope it helps..
