Actually, I think yours is most likely an Airflow by Shelby model nomenclature.
Shelby used Airflow through '37 and switched to Airflo in '38
The wishbone style frame was their top line product during it's run. As best I can tell, all variations with the wishbone frame, no matter the equipment level, were referred to as Airflow (or Airflo) models.
Unless someone produces a Gambles ad or catalog or other document, we don't know if Gambles used that term or not. I see that Western Auto did use "Air-Flo" for their Shelby built Airflo models.
Most of your components look early to me, like 1936ish. If true, the banana tank is the one you seek. It is also possible that it never had a tank and the batteries were housed in a can. Does it have a Morrow rear hub with date codes? Or what does the brake arm look like on the New Depature hub?