Show me your oldest error coin.

This is a take off of Show me your error coins. Mind is a Sumatra 1/2 Duit 1822 Km 280

1879 - Spain - 10 Centimos - two errors

Die rotation


Die cracks


https://en.numista.com/catalogue/pieces2596.html

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Just remembered an 1813 United Kingdom 1/2 Penny token I have ...

https://en.numista.com/catalogue/pieces6316.html

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Another United Kingdom 1/2 Penny token, this dated 1797 ...

https://en.numista.com/catalogue/pieces83589.html

My oldest error coin is probably one of my medieval islamic coins.
These are generally either off-centered, weakly struck or double struck or a combination of that.
But on these coins it is not a quality and you will be looking for the one that is well centered and fully struck.

So I will show a pair of French Revolutionary Décimes struck in the Year 5 of the Revolution which equals 1796.
I got this spectacular off center struck which is still fully identifiable for it's type, year and mint mark.


A couple of years later I came across this one (same type, date and mint mark) which is similarily off center struck with the incuse reverse on the other side.

Medieval Hungarian denar Zsigmond (1387-1437), double struck. The double strike is especially displayed on the reverse where two shields are visible one struck over the other. It's available for swap if someone collects error coins.

I have this Bolivian 50 centesimos from 1899 with a pretty serious die crack:



But otherwise I don't collect errors so I haven't anything older (that I'm aware of at least!)