I photographed these M1897 75mm Gun “French 75” examples in Brussels, Newport News, Quantico and the Ordnance Facility; Fort Lee
M1897 75mm Gun
Marine Corps Museum; Quantico VA 2026
M1897 75mm Gun
Brussels Military Museum 2026
M1897 75mm Gun
This has the WWI-era muzzle rollers at the front of the barrel, but looks to be installed on a WWII-era M2A3 mount with spoked crescent-shaped jacks near the wheels.