| Tail Number / N-Number | N6921M |
| Manufacturer | STINSON |
| Model | 108-3 |
| Manufacturer's Serial Number | 108-4921 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 94 miles per hour |
| Type of Registrant | Individual |
| Owner Name | TREADWAY TIMOTHY G |
| Street | 7950 FM 1948 RD W |
| City | BURTON |
| State | TX |
| Zip Code | 77835-5656 |
| Region | Southwestern |
| County | Washington County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1957-10-04 |
| Certificate Issue Date | 2022-12-24 |
| Last Action Date | 2022-12-24 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 52232253 |
| Mode S Code Hex | A934AB |