What are the varieties? [solved]

Hello.

What obverse and reverse varieties exist?

I was going through this type of coin to tick two off,

but in the comments part it says: Obverse and reverse varieties exist.

But, nothing else was added on what the varieties are.

Any information or help would be appreciated.

https://www.coins-of-the-uk.co.uk/values/halfp.html#:~:text=200%20750%203500-,Copper%20Halfpence,bar%20in%20As%20in%20BRITANNIA 

Ah, excellent!

Thank you for the help!