| Tail Number / N-Number | N6521M |
| Manufacturer | STINSON |
| Model | 108-3 |
| Year Built | 1948 |
| Manufacturer's Serial Number | 108-4521 |
| 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) |
| Engine Manufacturer | FRANKLIN |
| Engine Model | 6A4165 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 165 hp (123 kW) |
| Average Cruising Speed | 94 miles per hour |
| Type of Registrant | Individual |
| Owner Name | JACOBI JOSEPH L II |
| Street | 24487 AUDRAIN ROAD 340 |
| City | MEXICO |
| State | MO |
| Zip Code | 65265-5401 |
| Region | Central |
| County | Audrain County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1955-11-01 |
| Certificate Issue Date | 2004-02-11 |
| Last Action Date | 2022-03-01 |
| Expiration Date | 2029-07-31 |
| Status | Valid Registration |
| Mode S Code | 52113257 |
| Mode S Code Hex | A896AF |