1874 Hermosillo 10 Centavos Doubled Obverse & Reverse

This 1874 10 centavo is the first year of issue for the Hermosillo mint and it does not have a listed mintage. Despite that, this is understood to be a rarer low-mintage date. These earlier examples were often crudely struck as is the case for this example. The error noted here is the pretty clear doubling on both sides to include the eagle and the snake. The next error of note is that the 0 in the 10 on the reverse appears to be a backward Q. While there may be another explanation for that extra bit of metal, that is my interpretation of what I see. Also of note is that a friend swears that this is an overdate but I am not wholly convinced. The 4 is certainly re-punched and it does look busy under the 74 so for now I can only settle for maybe. Overdates are common on these coins so I would value community feedback on whether this is an overdate or not. I have been collecting the Mexican Republic 5 and 10 centavo coins for many years now and it has been my experience that finding doubled examples is rare let alone an example exhibiting it on both sides. To close this out I did find another example on another forum thread that is a bit better grade than my example and it is diagnostically the same. That leads me to wonder if this is common for this uncommon year. Either way it was too fun of a discovery, so I thought that it would be great to share. I hope everyone is healthy and that all have a Happy Holiday Season!!