1921 George V Copper Penny

Very common year in low condition. Krause's mintage figure on this coin is right, however, try finding a Uncirculated example of this year, it would be a medium level challenge. judging from the scans, I think your coin is EF maybe a little less.

No problem Nic, based on the trident and helmet of Britannia, as much as I can see this is a Ef coin, maybe a gVF but I can say in this condition, it worth around 0,70$-0,80$ to me. Give you a little tip on grading British Pennies, always take a magnifier at least 6x and check the fingers holding the trident, if the fingers are distinct and visible, move to the visor of the helmet. It should be high and unworn, than you definately have a uncleaned and a handsome penny.

Plus, always check if a "mint-darkened" farthing or penny twice to see any artifical "lustre" if it has, than the coin is circulated and cleaned which is a "opps whack" for numismatic value :)

Just want to know, how much did you pay on that Nic. :)..
Another thing, don't go after "shiny" pre-decimal UK pennies, lustre commands a premium for those conis and most of them got artifically shined to fool the unexperienced eye. However, years between 1961-1967 are easier to obtain (especially 1967) in lustre.