#1/4: The "upside-down-heart" is a Persian numeral "5" - it's only found on coins of Iran, Afghanistan and certain Indian states. In this case, I believe it's a 5 rials of Iran, Islamic Republic period. The date on this one is SH 1359 (= 1980 AD).
#2/3: Whenever you find a coin with only Arabic writing and "Western" numerals, the nations of North Africa are the place to look. In this case, it's Tunisia, 100 millim.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis
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