Style looks OK. Doors themselves look like they are circa 1880 - 1920. Just a guess though. I like doors to be consistent throughout a house and not mix 4 and 6 panel doors as are shown in the photos. I like the 4 panel look better but 6 panel may have been more popular during that period. You can ask a Philadelphia Historical Fairmont Park Mansion caretaker or tour guide. Be careful of the lead paint.
Cheers,
Paul

I realize you posted your question a long time ago. Perhaps you've already got your answer. In case you didn't, I rehabbed a house that was built in 1790 and the doors you're showing look very much like ours, which were original. Really old doors are incredibly heavy--like, you might need two people to carry it (at least ours were). Also, the hinges can be a great clue as to their age. The H-L hinges signify a very old door. I hope they're originals! Cheers.