These printers use the 7842224 cartridge:
Olivetti 231
Olivetti 243
Olivetti 351
Olivetti 545 E
Olivetti 548 S
Olivetti 1030 WP
Olivetti BY 311
Olivetti DY 811
Olivetti ET 101
Olivetti ET 121
Olivetti ET 125
Olivetti ET 201
Olivetti ET 202
Olivetti ET 211
Olivetti ET 212
Olivetti ET 221
Olivetti ET 225
Olivetti ET 231
Olivetti ET 243
Olivetti ET 251
Olivetti ET 321
Olivetti ET 351
Olivetti ET 351 TTX
Olivetti ET 401
Olivetti ET 420
Olivetti ET 450
Olivetti ET 501
Olivetti ET 505
Olivetti ET 506
Olivetti ET 1010
Olivetti ET 1010 WP
Olivetti ET 1020 WP
Olivetti ET 1030 WP
Olivetti ET Cart
Olivetti ETS 1010
Olivetti ETS 1020
Olivetti ETS 1030
Olivetti ETS 2010
Olivetti ETS 2020
Olivetti PR 225
Olivetti PR 251
Olivetti PR 259
Olivetti PR 351
Olivetti PR 420
Olivetti PR 430
Olivetti PR 450
Olivetti PR 505
Olivetti PR 540
Olivetti PR 550
Olivetti TES
Olivetti TES 351
Olivetti TES 401
Olivetti TES 501
Olivetti TES 516
Olivetti TES 601
Olivetti TES 621
Olivetti TES 1000
Olivetti Tescart
Olivetti Tescart 243
Olivetti TEX 1000
Olivetti TTX 401
Olivetti TTX 501
Olivetti TTX 1010
Olivetti TTX 1020
Olivetti WP 1020
Olivetti WP 1030
Assmann Texy 2000
Assmann Texytronic 2000
Atari SDM 121
Atari SDM 124
Atari SDU 121
Atari SDU 124
Atari XDM 121
Axiohm Elite 5
Axiohm Elite 5 CD
Axiohm Elite 15
Bdp 2040
Bdp WP 572
Blue-Chip D 20 /10 O.S.
Brandt 2791 ENCODER
Brandt 2792 ENCODER
Brandt 2793 ENCODER
Brandt 2794 ENCODER
Brandt 3000 ENCODER
Bull 4315
Bull 4316
Bull IMP 12
Bull Micral 90 /50
Bull PRU 7101
Bull TTX 35
Cardco LQ 1
Cardco LQ 2
Cardco LQ 3
Cardco PR 1
Cardco PR 3
Centronics CFT 2155
Commodore 2000 NS
Commodore 2022
Contitronix CI 1000
Contitronix CI 1100
Diamond Dicio T
Diamond Dicio W
Dyneer DW 16
Dyneer DW 20
Dyneer DW 36
Epson DX 20
Epson DX 35
Epson Ruby 11
Epson RV 80
Epson RV 90
Epson RV 100
Esselte Scribona 12
Esselte Scribona 20
Esselte Scribona 22
Esselte Scribona 23
Esselte Scribona 30
Hedman E 1000 ENCODER
Hedman E 2002 ENCODER
Hedman M 100 ENCODER
Hedman M 101 ENCODER
Hedman M 102 ENCODER
Hedman M 103 ENCODER
Hedman M 104 ENCODER
Hedman M 105 ENCODER
Hedman M 106 ENCODER
Hedman M 2004 ENCODER
Hermes H 19
Hermes Toptronic 21
Infotec Malice 1200
Infotec Malice 1900
Infotec Malice 2000
JUKI TG
Kardex 208 S
Kardex Remstar 208 S
Konica-Minolta EW 401
Konica-Minolta EW 501
Logitec WP 770
Logitec WP 7700
MDS 987
Mercedes 50 D
Mercedes S 50
Mercedes S 55
Mercedes S 60
Morrow MP 110
Morrow MP 200
NEC 15 LQ
NEC Authentic 15 LQ
NEC ISL Q
NEC LQ 15
Nrg PR 5500
Pacesetter NX 90
Panasonic 700 M
Panasonic Jetwriter 500 B
Panasonic Jetwriter 500 BD
Panasonic Jetwriter I
Panasonic Jetwriter I E
Panasonic Jetwriter II
Panasonic Jetwriter II E
Panasonic KE-E 2000
Panasonic KE-E 2020
Panasonic KE-E 2500
Panasonic KX-E 300
Panasonic KX-E 315
Panasonic KX-E 350
Panasonic KX-E 400
Panasonic KX-E 400 D
Panasonic KX-E 408
Panasonic KX-E 500
Panasonic KX-E 500 E
Panasonic KX-E 508
Panasonic KX-E 508 E
Panasonic KX-E 600
Panasonic KX-E 601
Panasonic KX-E 603
Panasonic KX-E 700
Panasonic KX-E 700 M
Panasonic KX-E 700 MF
Panasonic KX-E 701
Panasonic KX-E 704
Panasonic KX-E 708
Panasonic KX-E 828
Panasonic KX-E 4000
Panasonic KX-E 4000 I
Panasonic KX-E 4020
Panasonic KX-E 4020 I
Panasonic KX-E 4500
Panasonic KX-EP 35
Panasonic MX-E 400 D
Remington Rand 20
Remington Rand 1700
Remington Remstar 108
Remington Remstar 208
Remington Remstar 308
Remington Remstar 608
Remstar 108
Remstar 208
Remstar 208 S
Remstar 308
Remstar R 208 S
Sanko DY 211
Sanko DY 311
Sanko T/WS
Sanyo 4050
Sanyo PR 5000
Sanyo Serd PR-5000
Sanyo Serd PR-5500
Scribona 12
Scribona 20
Scribona 22
Scribona 23
Scribona 30
Seikosha Elites
Sigma Electric 7800 K
Sigma EX 200
Silver-Reed EX 55 M
Silver-Reed EX 56
Silver-Reed EX 66 FD
Silver-Reed EX 77 E
Silver-Reed EX 77 FD
Silver-Reed EX 78
Silver-Reed EX 78 E
Silver-Reed EX 78 FD
Silver-Reed EX 78 IF
Silver-Reed EX 85
Silver-Reed EX 87
Silver-Reed EX 89
Silver-Reed EX 200 IF
Silver-Reed EX 300
Silver-Reed EX 400
Silver-Reed EXP 400
Silver-Reed EXP 420
Silver-Reed EXP 500
Silver-Reed EXP 550
Silver-Reed EXP 550 DW
Silver-Reed EXP 600
Silver-Reed EXP 770
Silver-Reed EXP 800
Silver-Reed EXW 2000
Silver-Reed EZ 40
Silver-Reed EZ 43
Silver-Reed EZ 45
Silver-Reed EZ 45 B
Silver-Reed EZ 46
Silver-Reed EZ 46 B
Silver-Reed Memorymatic 44
Silver-Reed RO 55
Silver-Reed SR 400 P
Syntrex Aquarius I
Syntrex Aquarius II
Syntrex Aries I
Syntrex Libra
TEC TW 2000
TEC TW 3000
Towa EX 77
Towa EX 88
Towa TCA 700
Transtar 120
Transtar 130
UTAX T 2000
UTAX T 2300
UTAX T 3000
Vivitar T 120
Vivitar T 130
Wincor-Nixdorf CF 130
Wincor-Nixdorf EX 60
Wincor-Nixdorf EX 300 FD
Wincor-Nixdorf EX 300 IF
Wincor-Nixdorf EXP 620
Wordtronix Sheriff
Wordtronix Typewriter 20
Wordtronix Typewriter 35