These printers use the 8R-3626 cartridge:

Xerox-Tektronix 7020

Xerox-Tektronix 7021

Xerox-Tektronix Telecopier 7020

Xerox-Tektronix Telecopier 7021

Adler-Royal FX 2000

Adler-Royal FX 2100

Olivetti FX 2000

Savin 7020