Hist Buff says it all. I love history and the vast majority of all my stories (here and elsewhere) are set in a different time period. I'm a history buff in that sense. I'm especially fond of that classic film noir era in mid-20th century.
The Oxford definition of "buff" says, "A person who is very interested in a particular subject or activity and knows a lot about it." It does not say "who knows ALL about it". My stories are first and foremost sexual fantasy, not anything that pretends to be 100% historically accurate. As long as the readers have a wonderful journey in a different time and place, and myself as I write the story, then it is all I ask.