"IMHO, accurate mocs are as easy to make as inaccurate ones; sometimes easier, and they look better and are more comfortable to wear."
A+++
I've always figured that if you are going to do something, might as well do it right as do it wrong. So yes---research what is correct for your area or your area of interest. And look into what correct for the time period you are aiming for. Styles changed, often radically, over time. Many museum examples can have rather late dates--often from the 1880-1920 range, especially for clothing. Resist the urge to tear modern clothing apart--all you'll end up with is modern clothing done in leather. By the way, if you can swing it, try using braintan---not only is it correct, but it's nowhere near as slick as chrometan to walk in.
Rod