These printers use the 75P6051 cartridge:

IBM Infoprint 1422

IBM Infoprint 1422d

IBM Infoprint 1422dn

IBM Infoprint 1422xn Special Edition

Lexmark T 430

Lexmark T 430 D

Lexmark T 430 DN

Lexmark T 430 DTN

Lexmark T 430 N