Serial Information for the 520-40 4WS
| Year | Est. Retail High | Est. Retail Low | Beginning Serial # |
|---|---|---|---|
| XXXXX | XXXXX | XXXXX | |
| XXXXX | XXXXX | XXXXX |
| Year | Est. Retail High | Est. Retail Low | Beginning Serial # |
|---|---|---|---|
| XXXXX | XXXXX | XXXXX | |
| XXXXX | XXXXX | XXXXX |