Concerto in F minor Op. 21 for 2 Pianos: Chopin National Edition Volume XXXI (Series B. Works Published Posthumously / Seria B. Utwory Wydane Posmiertnie, 6b)
| Country | USA |
| Brand | OKKO |
| Manufacturer | OKKO |
| Binding | Apparel |
| ItemPartNumber | 3623 |
| Model | 3623 |
| Color | Black |
| Size | 11" x 4 1/2" x 3 3/4" |
| UnitCount | 6 |
| EANs | 4657840441027 |
| ReleaseDate | 0000-00-00 |