Osborne Straight Needle Information Osborne No. 409 Osborne No. 501 Osborne No. 501-1/2 Osborne No. 501X Osborne No. 502 Osborne No. 502-1/2 Osborne No. 502X Osborne No. 503 Osborne No. 513 Osborne No. 513X Osborne No. 553 Osborne No. 741