Pocket Watch

I have a pocket watch passed down to me.  It no longer works but I was told it was my great, great, great, great, great grandfathers who bought it used when he rode the railroad.  I am in my mid 40's and was wondering the year it's from, and what it is and if it's worth anything.  I'm not interested in selling it, just the history.  The back has a woman on a horse with a bird in her hand.  The face has a building similiar to a church or general store on the edge of a river with mountains in the background.

Poor