Gregg,
If the flag being offered is not one belonging to the 10th or 19th So. Ca., what is the possibility that it may have belonged to the 34th Ala.? I had an ancestor, John W. Williams that served in the 34th, Co. A. The only flag I've found that can definitely be tied to the 34th is the artillery sized Augusta Depot flag held by the Alabama Dept. Of Archives & History. I have some suppositions based on researching affiliated units, but nothing definitive or really even verifiable.
Charles B.