I feel like the 'Bengal' tigers in Ragunan might have better chances as being the pure one compared to the newer zoos due to how long they have maintain tigers, but they're most likely already interbreed with new and unpure tigers.
@Rizz Carlton That's interesting. It's totally bonkers that Ragunan Zoo has FIFTEEN Tiger exhibits. It's a massive zoo and these aren't small cages either as some are large grottoes.