Mistakes watch related and not

[Alou]

There is something wrong with the tachymeter,yes you are right takes time to spot,For most it could have been undetected but if used to count speed ,you will fin that it should have been 200 and to 200,Thats easy to replace though just change bezels.But how am i gona make $$$$ afterwards !If ithis was a Patek .........hmmmm!

[dj57]

The tachymeter bezel – one of the standout features of the Speedmaster – displays a typo. It should be “200”, but instead, it shows “220”.

—> This Speedmasters made in 1970, with the ref. 145.022-69.

—> Apollo13: 11. Apr. 1970 – 17. Apr. 1970

Good thing this one wasn’t sent into space.

[jrlmsla]

A slightly more recent example of a watch that some believed to have been a mistake was an anomalous Nautilus ref. 3710.

The watch is known as the “Lucky Thirteen”
Can you spot the anomaly?

I thought I read that this was a customization requested by the buyer wanting a 13 on the dial, And that to keep the dial aesthetic they just switched the VIII for XIII.