Paralyse, your 1826 Farthing is very interesting as there were 2 types that year, the older head you see on mine and Numisrob's and your is the younger fuller faced head.
The earlier type was issued 1821/26 and later 1826 to 1830.
I love seeing the more battered coins of this era, afterall they are nearly 200 years old and at this time, many of them were exported around the burgeoning empire (Probably most of my post 1800 UK coins have a Kiwi/Aussie context).
Here is my sole 1825 piece, a better than average halfcrown.


A bit of darkening and staining, here is a coin in gFine heading towards VF condition and actually a lot better preserved than my 1826 yesterday. I also paid a lot more for it than my 1826. Prices for coins of this era go up exponentially above VF condition.
1825 was also the 1st year of this 3rd design and 2nd skinnier head bust. Earlier coins have the fleshier and more jowled king.
George's vanity forced this change to a nicer portrait, take this famous painting - designed to make him look as pretty as possible!
An imagined Thomas Lawrence portrait showing him as a skinny dandy. The portrait is real, but Lawrence was under orders to magically remove excessive poundage from his body. This is 1815, but George loved dressing like Beau Brummel, obviously with a hairpiece to his death.

A more actual tint from 1821

Uploaded from Wikipedia Article with attribution below
By George Atkinson & T.C.P. & Charles Joseph Hullmandel(Life time: (fl) 1806-1826 & ? & 1789-1850) - Transferred from en.wikipedia to Commons.(Original text: Original publication: G. Atkinson, Brighton, UKImmediate source: Sammlung de Salis), Public Domain,
https://commons.wikimedia.org/w/ind...rid=47575210George was my weight by the age of 31 (I am 17 stone) and a 50 inch waist in 1820 about 350lb at least.
The top portrait makes him look like an 1820s version of Prince. The bottom is more real, but he still has his jet black hair piece.
We are now far back enough to see a long s as well "Publifhed"