Nope It's one of the part of smth like this www.bidsquare.com/online-auctions/timeline-auctions-limited/viking-horse-bit-with-silver-inlaid-dragons-1202451
I wouldn't want to specifically name the country, fearing treasure hunters may pilgrimage to my secret treasure spots. In general, it's Eastern Europe.
This coin is from Heraclius . Ine of the greatest Eastern Roman Emperors because he depended against the persians and saved the empire from a huge economic crisis .
IMHO, it's similar to this - ru.m.wikipedia.org/wiki/%D0%A4%D0%B0%D0%B9%D0%BB:Lenin_Relief_at_Memento_Park.JPG. There were many reliefs in Soviet-occupied countries.
Yes, nails can be a nuisance... but among the iron signals, there are also interesting artifacts, such as this Viking Battle Axe - ru-vid.comBYb7vyFyxBQ