| Tail Number / N-Number | N439M |
| Manufacturer | SMITH MICHAEL R |
| Model | SONEX |
| Year Built | 2014 |
| Manufacturer's Serial Number | 439 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AEROVEE |
| Engine Model | 2.1 |
| Engine Type | 4 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 80 hp (60 kW) |
| Type of Registrant | Corporation |
| Owner Name | SMITH MICHAEL R |
| Street | 14 HOWARD RD |
| City | MAYNARD |
| State | MA |
| Zip Code | 01754-1556 |
| Region | New England |
| County | Middlesex County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2014-05-25 |
| Certificate Issue Date | 2013-02-13 |
| Last Action Date | 2021-12-11 |
| Expiration Date | 2029-02-28 |
| Status | Valid Registration |
| Mode S Code | 51242640 |
| Mode S Code Hex | A545A0 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N439M.
| Tail Number / N-Number | N439M |
| Manufacturer | STINSON |
| Model | JR. R |
| Manufacturer's Serial Number | 8520 |
| 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 | 150 miles per hour |
| Type of Registrant | Individual |
| Owner Name | OLIVER H WALTON |
| Street | KINGSBURY ST |
| City | NEEDHAM |
| State | MA |
| Zip Code | 02492 |
| Region | New England |
| County | Middlesex County |
| Certificate Issue Date | 1933-10-17 |
| Last Status | Valid Registration |
| Cancellation Date | 1933-11-14 |