| Tail Number / N-Number | N439FK |
| Manufacturer | FOKKER |
| Model | FOKKER C-4 |
| Year Built | 1923 |
| Manufacturer's Serial Number | 4127 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Type of Registrant | Corporation |
| Owner Name | OWLS HEAD TRANSPORTATION MUSEUM |
| Street | ROUTE 73 BOX 277 |
| City | OWLS HEAD |
| State | ME |
| Zip Code | 04854 |
| Region | New England |
| County | Knox County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1998-10-08 |
| Certificate Issue Date | 1995-10-11 |
| Last Action Date | 2021-10-28 |
| Expiration Date | 2029-01-31 |
| Status | Valid Registration |
| Mode S Code | 51242424 |
| Mode S Code Hex | A54514 |