Preston and York full length wool/fur/faux fur ladies winter coat - high end!

My mother has asked me to sell some of her underused, high quality clothing. She lost a lot of weight and her job due to leukemia 5 years ago (she’s winning!) and has lot of nice stuff to part with. I know nothing more about this that what is in the pictures and what she tells me. It has a fully removable fur collar, if you want to add/remove an aristocratic touch. Is this a trench coat or a pea coat?