Chan Chan

Gotta love chaotic covers like this one! From a 6v set these 1968 green stamps feature carved adobe from the expansive ancient city of Chan Chan (c.850-1470).
Thank you Juan!
Thank you Juan! 'Pro-restoration of Chan Chan' issue. This is no./170 of 4000 FDCs.
Thank you Guy! #4 shows a similar relief to above stamp. 

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