STUMPED! Foreign coin with counter stamp

[Land-Sea]

This one has me stumped. I bought a large foreign coin lot off ebay. Mostly mixed "stuff" valued at about what I paid for it. A few unusal ones came out of the lot, this one below being the strangest to me. Looks to be a Peruvian 9 decimos and has a date of 1869. Now here's the weird part. In the center it appears to be counterstamped with another coin! That one reads Republic of Guatamala 1/2 real. On one side it reads Libertad 30 Juno 1871, on the other side it reads Libertad 30 sept 1821. So maybe a 50th anniversary coin in the center?? Strange! Jake

 

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[Land-Sea]

Sorry I missed on getting the photo of the otherside. Thanks Jake

 

[Leon]

It looks like the second coin from the bottom on this site:
http://www.studium.com/9/crowns.html
The one at that site is from Peru but,,, there is no counter stamp on it,,,
Interesting coin, WTG!!!
Good luck on a positive ID, & appy hunting~

 

[Charlie P. (NY)]

Not an answer to your question, but a thought. ?Some countries mistrusted others coinage, and once a sample of the assay for a given coin was accepted they counterstamped the coins that had entered into their country in trade. ?It was all about the silver content and not the denomination ?~ made for a real mess at times and is one reason we got off the silver (or gold) standard. ?I don't know this is the case here, and that would be a pretty fancy stamp. ?Our 1870's trade dollars show up with Chinese chop marks.