Subchaser SC 395 was built at New York Yacht, Launch & Engine, and sold to France, re-designated as C 67 in the French navy. This photo shows the chaser with the French designation.
Jack Hudock notes that the deck gun is a naval version of the famous "French 75," the 75mm Model 1897.
Thanks to Mark Teraillon for submitting the photograph to The Subchaser Archives.