GC420d Desktop Printer Support & Downloads | Zebra
Amazon.com : ZEBRA GK420d Direct Thermal Desktop Monochrome Printer Print Width of 4 in USB Serial and Parallel Port Connectivity GK42-202510-000 : Label Makers : Office Products
ZEBRA GC420d Direct Thermal Desktop Printer Print Width of 4 in USB Serial and Parallel Port Connectivity GC420-200510-000 : Office Products - Amazon.com
Amazon.com: ZEBRA GC420d Direct Thermal Desktop Printer Print Width of 4 in USB Serial and Parallel Port Connectivity GC420-200510-000 : Office Products
User manual Zebra GC420d (English - 100 pages)
Zebra GC420D Manual Print Width Adjustment - How to Tips and Tricks by @3labels - YouTube
Zebra GC420d USB Serial Parallel Direct Thermal Shipping Label Printer | eBay