Hi Glen,
Thank you for posting both the photos of earlier period examples as well as examples of the later productions in your own fixed-blade collection. My collection is similarly far more heavily stocked with 20th century Bowie knives than earlier pieces. A vast majority of my Bowies are found with Buck, Case, Ka-Bar, Gerber, Western, and others' names stamped on the blade, a testimony in my opinion to the enduring nature of the design. Consider that the Bowie-profile Mark 2 - not the Vietnam-era dagger made by Gerber, but the mil spec issue introduced during WWII - is still the standard-issue fighting knife issued today by the USMC.
Nice BMF by the way...
Below are a couple images of old daguerreotypes of Civil War soldiers armed with Bowie knives: