Battle Trophy Tallisman drop rates

So I know that Gaijin doesn’t exactly like giving out the drop rates of any particular item from free trophy crates but I do know that if you get a Talisman that also has to do an additional roll for what vehicle it goes on and its generally going to be for a lower tier vehicle out of anything.

So genuinely what were the odds of this happening?
image

i have unlocked most of the Japan air tree but not purchased everything so this feels like one in a million.