L. B. Gatcomb & Co. published “Gatcomb’s Banjo & Guitar Gazette” from 1887 to 1891, then changed the name to “Gatcomb’s Musical Gazette” in 1891 and ceased publication in 1899.
Since I haven’t seen more issues than are listed below I can’t fill in the full range of issues. An amazing index of American banjo, mandolin and guitar journals, which includes the Gatcomb journals, was written by Jeffrey Noonan: The Guitar in American Banjo, Mandolin, and Guitar Periodicals, 1882-1933.
Published dates: 1887-1891 (Banjo & Guitar Gazette), 1891-1899 (Musical Gazette)
Total number of issues: 20+