These printers use the 75P6958 cartridge:

IBM Infoprint 1532

IBM Infoprint 1532 Express

IBM Infoprint 1532 EXPRESSN4536-N01

IBM Infoprint 1552

IBM Infoprint 1552N

IBM Infoprint 1570 MFP

IBM Infoprint 1572

IBM Infoprint 1572 MFP

IBM Infoprint 1572 N

Burroughs-Unisys UDS-540

Burroughs-Unisys UDS-544

Burroughs-Unisys UDS-544 MRN

Burroughs-Unisys UDS-544 N11

Huntress-Corp T 642

Lexmark T 640

Lexmark T 640 DN

Lexmark T 640 DTN

Lexmark T 640 N

Lexmark T 640 TN

Lexmark T 642

Lexmark T 642 DN

Lexmark T 642 DTN

Lexmark T 642 N

Lexmark T 642 TN

Lexmark T 644

Lexmark T 644 DN

Lexmark T 644 DTN

Lexmark T 644 N

Lexmark T 644 TN