These printers use the 12A6765 cartridge:

Lexmark Optra X-622

Lexmark T 620

Lexmark T 620 DN

Lexmark T 620 IN

Lexmark T 620 N

Lexmark T 622

Lexmark T 622 DN

Lexmark T 622 IN

Lexmark T 622 N

Lexmark X 620 E

Lexmark X 620 E MFP