These printers use the Savin 821028 cartridge:

Savin CLP 340 C

Savin CLP 340 D

Savin CLP 340 DT1

Savin CLP 350 C

Savin CLP 350 D

Savin CLP 350 DT1

Lanier LP 540 C

Lanier LP 540 CT1

Lanier LP 550 C

Lanier LP 550 CT1