28 mm diameter, 1.4 mm thick, 4.7 gr perhaps it was acquired in some european market 30 years ago but not sure, very bad shape can't read anything clear, in the middle might be something as "SA 50 C" but it is not clear could be anything. Could be copper?
any help would be appreciated!
Cannot check more in derail now but that would definitely be the arms of the Papal States
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Thank you guys. Indeed after careful observation the letters of Mezzo Baiocco could be recognized, according to your suggestions, from Benedict XIV minted in Ravenna. Solved!