The two first ones both look like 1 fals pieces from Tunisia. I think the date on the first one looks like 1186, which would be around 1773 in the Gregorian calendar; the second one's date is 1178, which would be around 1765 in the Gregorian calendar.
Do you happen to know the weight and/or diameter of the last coin? I cannot see a date on that one, so either of those things may help with identifying it.
At 11.6 grams, the closest match I can find is of a 1 falus piece from the Indian state of Awadh, made from either 1851 or 1852. If you rotate the first picture ninety degrees counter-clockwise, you can see a mermaid-like figure. That matches up with the example found here. The other side is more off-struck, but the '3' symbol on that side matches up on both your example and the one in the link. I am not sure where the date is located though...
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