The best available serial number chronology puts it as an 1897 vintage gun which qualifies as an Antique. Once the Ithaca hammerless gun grade structure settled in the No. 3 regularly came with the Chain Damascus barrels.
The surviving Ithaca records are at the McCracken Research Library at the Buffalo Bill Center of the West in Cody, Wyoming. You can get a letter on the gun from them --
https://centerofthewest.org/explore/...ecords/Ithaca/