Ithaca double serial number 211464 would be a Flues Model if hammerless, or a NIG Model if a hammer gun, from 1911. The gauge and grade will be stamped near the front of the left side watertable (flat part of the receiver the barrels close down against). In that era the lowest grade gun that was catalogued with Damascus barrels was the No. 1 1/2. We need to see some pictures to really offer you much help.
In those early years of the Flues Model Ithaca built many of their 16-gauge guns extremely light weight, and these very light weight guns have a reputation for very thin barrels and frames that cracked when North American Nimrods began feeding them a steady diet of Super-X type shells in the 1920s.
Last edited by Researcher; 03/08/10 01:18 PM.