Re: Ithica dbl. Flues?
Well Jack......I'm no expert on high end Ithacas, but according to the Shotgunworld.com website, #338543 is, indeed, a 1919 Flues Model.
No way to tell from the serial # what the gauge, choke or shell size are, but if you take it to a local gunsmith, he can probably tell you from a quick examination.....and for just a few $$$$, he can check it out and see if it's safe to shoot.
These early Ithaca doubles can be pretty valuable guns, and are certainly worth a few $$$$$ to have them checked out by a gunsmith. Some were made for blackpowder, and some are safe with modern smokeless powder loads. A decent gunsmith can tell you which, and what, you have.