These printers use the 841000 cartridge:

Lanier LD125

Lanier LD125SPF

Gestetner DSM625

Nashuatec MP2500

Nashuatec MP2500SP

Ricoh Aficio MP2500

Ricoh Aficio MP2500SP

Ricoh Aficio MP2500SPF

Ricoh Aficio MP-2500 LN

Savin 7025

Savin 7025SPF