Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N4526.
| Tail Number / N-Number | N4526 |
| Manufacturer | SWALLOW AIRPLANE CO |
| Model | B1 MAIL PLANE |
| Year Built | 1927 |
| Manufacturer's Serial Number | B1 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Corporation |
| Owner Name | BERWICK-WATSON AIR SERVIC |
| Street | 2637 MONTANA ST |
| City | OAKLAND |
| State | CA |
| Zip Code | 94601 |
| Region | Western-Pacific |
| Certificate Issue Date | 1928-02-24 |
| Last Status | Valid Registration |
| Cancellation Date | 1929-12-15 |
| Mode S Code | 51276264 |
| Mode S Code Hex | A57CB4 |