Old Western Nebraska Authentic Cowboy Rain Slicker Jacket

This is an old western cowboy authentic rain slicker jacket worn by cowboys while on horseback. These are difficult to find and it came out of an estate in  Western Nebraska. It has all of the snaps still intact and is still supple with no drying out. It has numbers marked inside at the collar and there is a 38 in larger numbers inside that we assume to be the size. There is some light wear at the back of the collar as well as an interior lining hole which does not affect the outer waterproof material and it measures about 50" in length.