Rare Serial? (Mark)

Normally, the serial number of this banknote (1922 - 1000 mark) will be green, red or black. I've never been able to find a gold serial number on the internet. Do you think it's rare?

These notes are almost worthless. Yellow serial doesnt make them worth more. 

Your banknote started life with a brown serial number. One of two possibilities are here. Exposure to light has faded the serial number or it was badly under-inked at the time of printing. Either way, your note has less value than other notes in the same condition.