I’m not sure Jim Bowie ever saw what we call a “Bowie knife” today.
Here’s one commissioned by his brother Rezin, 1830’s after his brother Jim’s death. Rezin after all was the guy who had the original Bowie knife made for Jim that he used in that famous sandbar brawl, 1827. So Rezin prob’ly knew what Jim’s knif(ives) looked like.
https://officialalamo.medium.com/march-artifact-of-the-month-searles-bowie-knife-5c491a3eb3a0