12 o'clock: tell me and we'll both know. I have a very similar one in my "mystery box".

2 o'clock: Nepal, as DCH said.
5 o'clock: Mysore, as DCH said.
7 o'clock: it's either Cambodian, a pe or 2 pe from the 1700s or 1800s, or an early mediaeval Indian.
10 o'clock: square copper coins like this are typically from the Sultanate of Malwa, a mediaeval Indian state.
zeno example. Rectangular ones are typically much older, from the post-Mauryan period, circa 200 BC.
zeno example. I'd lean towards ancient for this one.
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