I have a 28 gauge Flues. Judging by serial number it dates to 1911, the first year Ithica chambered for the 28 gauge. It has fluid barrels. I'm not sure what the grade would be except that I think it's the Plain Jane version as the "engraved" scenes appear to be rolled on. There has been a bit of controversy about the chambering. A guy at a gun show dropped in a chamber gauge and said 2-1/2 inch. Local gunsmith made a cast and said 2-3/4 inch. My own ball point pen test says 2-9/16 inch. It has been used with 2-3/4 in 3/4 oz loads. A guy who was supposed to be knowledgable said they were OK, but avoid 1 oz loads as it would be recoil that might damage it rather than pressure. So I am still figuring. mean while, the action is nice and tight. It's very light and short as if it were intended for a small woman or child.
Two other questions to figure, what is it worth, and should I attempt to refinish or restore it? I've been pondering the latter question for the last 10 years. I did get a small dent in the barrel pushed out.
I have some modern 2-1/2 inch 9/16 oz loads. So 2-1/2 inch cartridges can be had if you dig deep enough.
