| Registration / Serial: | Not known |
| Military Code: | 8 |
| Aircraft Original Type: | Douglas O-31 |
| Aircraft Generic Type: | Douglas O-31 |
| Aircraft Version: | Douglas YIO-31A |
| C/n (msn): | Not known |
| Operator Titles: | USA - Air Force |
| Unit Markings: | California ANG |
| City / Airport: | Los Angeles - Griffith Park (closed) |
| Region / Country: | California, United States |
| Photo Date: | 1930 |
| Photo from: | AirHistory.net Photo Archive |
| Photo ID: | 766800Submit Correction |
| View count: | 630 |
In the era of this photo, the USAAC serial was on a small stencilled panel on the port side of the fuselage near the cockpit. There were only four YIO-31As built. The California National Guard air wing was based at Griffith Park airfield in the 1930s. It closed in 1939. Photo from: The Early Aviation Photograph Collection/The Museum of Flight
| Registration / Serial: | Not known |
| Aircraft Version: | Douglas YIO-31A |
| C/n (msn): | Not known |
| Operator Titles: | USA - Air Force |
| City / Airport: | Los Angeles - Griffith Park (closed) | Region / Country: | California, United States |
| Photo Date: | 1930 |
| Photo from: | AirHistory.net Photo Archive |
| Registration / Serial: | Not known |
| Military Code: | 8 |
| Aircraft Original Type: | Douglas O-31 |
| Aircraft Generic Type: | Douglas O-31 |
| Aircraft Version: | Douglas YIO-31A |
| C/n (msn): | Not known |
| Operator Titles: | USA - Air Force |
| Unit Markings: | California ANG |
| City / Airport: | Los Angeles - Griffith Park (closed) |
| Region / Country: | California, United States |
| Photo Date: | 1930 |
| Photo from: | AirHistory.net Photo Archive |
| Photo ID: | 766800Submit Correction |
| View count: | 630 |
In the era of this photo, the USAAC serial was on a small stencilled panel on the port side of the fuselage near the cockpit. There were only four YIO-31As built. The California National Guard air wing was based at Griffith Park airfield in the 1930s. It closed in 1939. Photo from: The Early Aviation Photograph Collection/The Museum of Flight
| Registration / Serial: | Not known |
| Aircraft Version: | Douglas YIO-31A |
| C/n (msn): | Not known |
| Operator Titles: | USA - Air Force |
| City / Airport: | Los Angeles - Griffith Park (closed) | Region / Country: | California, United States |
| Photo Date: | 1930 |
| Photo from: | AirHistory.net Photo Archive |