By September of 1897, Orville had moved his studio to a larger space on the second floor of 104 East Main. In the photo, it’s the second building from the right below where the ‘Business College’ sign hangs. This studio was above the Foster & Post five and dime store.
Among Orville’s output by this time was two complete sets of instruments, one for his own Orpheus Mandolin Club and one for the John W. McLouth Ideal Mandolin Orchestra.
Orville had previously advertised in the newspaper, but at this point he also placed a pictured ad in the 1897 Kalamazoo City Directory. This advertisement also answers my question as to whether he had an exhibit at the 1893 World’s Fair.
The first annual Kalamazoo Street Fair took place October 12-13-14 of 1897. Since his studio was on the second floor, Orville probably displayed his instruments and wares on the sidewalk below as did many other merchants.