This Epson ERC 23 ribbon fits:

Axiohm A714
Canon TX 50 III
Data Techno DT-R 260
Datamega DPN-2369, Datamega DPN-2600, Datamega DPN-2604, Datamega DPN-2610, Datamega DPN-2620, Datamega DPN-2621, Datamega DPN-2639, Datamega DPN-2650, Datamega DPN-2671, Datamega DPN-2690, Datamega TM-300
DED D174
DH Tech DH 1400
Epson 250, Epson 252, Epson 255, Epson 257, Epson 260, Epson 262, Epson 264, Epson 265, Epson 267, Epson 270, Epson 280, Epson 280A, Epson 280V, Epson 300D, Epson ERC-23, Epson M 17-JB, Epson M 250, Epson M 252, Epson M 255, Epson M 257, Epson M 260, Epson M 262, Epson M 264, Epson M 265, Epson M 267, Epson M 270, Epson M 280, Epson M 280A, Epson M 280V, Epson RP-265, Epson TM-267A, Epson TM-267B, Epson TM-267C, Epson TM-267D, Epson TM-267II, Epson TM-270, Epson TM-300A
Esper 875 remote ptr
Fuji Systems FZ-1134, Fuji Systems FZ-2144
IBM 4651, IBM 4655, IBM 4661
IPC M173IP, IPC MPS-328, IPC PRT 267-081, IPC 270
Kingtron CL Series
Krone EFT Printer
Micros 1200W, Micros 1700 , Micros 2700, Micros 4000W
Nabanco Accesspoint Printer
NCR 2170, NCR 2174, NCR 2190, NCR 7161, NCR 7445-100x, NCR 7454
Nixdorf ND 62
Norand 4810
Omniprint OM-100, Omniprint OM-200, Omniprint OM-265, Omniprint OPC-200
Panasonic 7000-P100, Panasonic JS-7000, Panasonic JS-8000, Panasonic P100WP, Panasonic PM300
Remanco Vision System Printer
Royal CMS-9160
Sanyo ECR 590, Sanyo ECR 595
Sharp ER-2975, Sharp ER-3210
Siemens 70 Beetle Printer
TEC RE-2000, TEC RE-2500, TEC RE-3000, TEC RE-3500
Tidel is1000, Tidel is6000
Towa ET 1420
Tripod DR0107
Triton 9500
Uniwell TP-420, Uniwell TP-422, Uniwell TP-522, Uniwell TP-722
Verifone Diamond Supersystem, Verifone Emerald Supersystem, Verifone Gemstone Line, Verifone P220, Verifone P250, Verifone P500, Verifone Sapphire Supersystem, Verifone Tranz 330
Woojin ADP-200, Woojin ADP-300, Woojin ADP-400
And many more!