The serial number would show it as a 1923 gun. Maybe whoever typed up the add hit the top number on the keypad rather than the bottom one.
Charts show the last Flues being made in 1926. For 1925 they only show 13 Flues models having been built Only the beginning number is listed for '26 but I doubt many were made that year either.


Miller/TN
I Didn't Say Everything I Said, Yogi Berra