American Revolution Princeton Battlefield Black Locust Tree Pen # GANH25038Thie is not just a pen, it is a piece of history that you use and carry with you, as a pen. Imagine the look on their face when your history loving military friend or relative realize what you just gave them. I made this pen from a Black Locust tree growing in Princeton Battlefield. There are a couple of pieces of turquoise where some wood was missing, For more items from this site click here or try my Etsy site here. Pen Features. Alternate hardware.