Welcome to CCF l
The most commonly seen question seen here, especially from new collectors is, "What is this mark on my note ?" Most of the correct answers come from members with the understanding of how our banknotes are printed. A large, upper case black "K" is not normally seen anywhere on modern $1 FRNs. The large upper case "K" in green preceding the serial number is from a serial number print head that is being fed bulk green ink through tubing coming from a large vat of green ink. Knowing this eliminates it from any chance of it being a production error.
Edited by SteveInTampa
12/15/2021 05:45 am