These printers use the 12A6735 cartridge:

Lexmark Optra T-520

Lexmark Optra T-520 D

Lexmark Optra T-520 N

Lexmark Optra T-520 N SBE

Lexmark Optra T-520 SBE

Lexmark Optra T-520 VN

Lexmark Optra T-522

Lexmark Optra T-522 N

Lexmark T 520

Lexmark T 520 D

Lexmark T 520 DN

Lexmark T 520 N

Lexmark T 520 N SBE

Lexmark T 520 SBE

Lexmark T 522

Lexmark T 522 DN

Lexmark T 522 N

Lexmark X 520

Lexmark X 520 MFP

Lexmark X 522

Lexmark X 522 MFP

Lexmark X 522 S

Lexmark X 522 S MFP

Burroughs-Unisys UDS 130

Burroughs-Unisys UDS 130 N

Burroughs-Unisys UDS 132

Burroughs-Unisys UDS 132 N

Gestetner P 6220

IBM 4520-001

IBM 4520-002

IBM 4520 D01

IBM 4520 D02

IBM 4520 DN1

IBM 4520 DN2

IBM 4520 N01

IBM 4520 N02

IBM 4525-001

IBM 4525-002

IBM 4525 DN1

IBM 4525 DN2

IBM 4525 N01

IBM 4525 N02

IBM Infoprint 1120

IBM Infoprint 1120 D

IBM Infoprint 1120 DN

IBM Infoprint 1120 M

IBM Infoprint 1120 MI

IBM Infoprint 1120 MIX

IBM Infoprint 1120 MN

IBM Infoprint 1120 N

IBM Infoprint 1125

IBM Infoprint 1125 DN

IBM Infoprint 1125 M

IBM Infoprint 1125 MI

IBM Infoprint 1125 MIX

IBM Infoprint 1125 MN

IBM Infoprint 1125 N

Micro-Plex Rapid 18-3

Micro-Plex Rapid 24-3

Nashuatec P 6220

Nashuatec P 6225

Rosetta RT 1120 M

Rosetta RT 1120 MI

Rosetta RT 1120 MIX

Rosetta RT 1120 MN

Rosetta RT 1125 M

Rosetta RT 1125 MI

Rosetta RT 1125 MIX

Rosetta RT 1125 MN

Source-Technologies ST 1120

Source-Technologies ST 1125