Amazon.com : ZEBRA GK420t Thermal Transfer Desktop Monochrome Printer Print Width of 4 in USB Serial and Parallel Connectivity GK42-102510-000 : Label Makers : Office Products
User manual Zebra GK420d (English - 88 pages)
Zebra GC420 Easy Manual Darkness Adjustment - Tips and Tricks, How To - YouTube
POS FAQ How do I manually Calibrate my GK420 Zebra | POSGuys.com
Zebra GK420t Monochrome Desktop Direct Thermal/Thermal Transfer Label Printer with Fast Ethernet Technology, 5 in/s Print Speed, 203 dpi Print Resolution, 4.09" Print Width, 100/240V AC | CardMachineOutlet.com
Links to Zebra GK420d user guide and videos – nShift
Amazon.com : ZEBRA GK420t Thermal Transfer Desktop Monochrome Printer Print Width of 4 in USB Serial and Parallel Connectivity GK42-102510-000 : Label Makers : Office Products