How to Install and Configure zebra barcode printer GC420T - YouTube
User Guide Zebra GC420t™
Black and White Thermal Printers Zebra Barcode Printer GC - 420T, USB
Amazon.com : ZEBRA GC420t Thermal Transfer Desktop Printer Print Width of 4 in USB Serial and Parallel Port Connectivity GC420-100510-000 : Label Makers : Office Products