can be seen here and here as well). The service was popular and successful, but after the air mail contract scandal in the mid-1930s, Kohler was prohibited from re-bidding them, and without that lucrative source of income, the company went down.
At some point, some of the Kohler Loenings, including 33H, were then sold to Chalk's Flying Service, where they were operated from a small seaplane base on Biscayne Blvd in Miami (a wonderful old photo of the base and our plane can be seen here). Arthur "Pappy" Chalk, a WWI veteran, started the air service in February, 1919 and kept it going until he sold it in 1966! At some point, Chalk's moved their operations to Miami's Watson Island. Given the differences in the background between our photo and the one linked above, I'm guessing that our location is Watson. If anyone can confirm that, please comment below.
Another photo of 33H at Chalks can be seen here.