Quote:
...since there's no letters or numbers on them...
There are plenty of letters and numbers on most of them. They're just neither Latin letters nor Western-Arabic numbers.

#1: China, Empire, from the reign of the Tong Zhi emperor ((1862-1875), Yunnan Province mint. The languages are Chinese on the bottom pic and Manchu in the top two pics. Value: a dollar or so.
#2: What svslav said: Indian state of Baroda, 2 paisa. The script is Devanagari. The four squiggles in the two middle pics that look kind of like "9988" are the numbers 1949 in that script. The second and fourth pics are "right way up". Value: about $3 in that condition.
#3: This one, sadly, is not a real coin. It's a modern replica of an ancient Jewish coin from the Second Revolt, circa 130 AD. See
this thread for an identical example;
this one is a somewhat cruder copy. The second and fourth pics are "right way up" on this one, too. Value: maybe a dollar or so, as a curiosity.
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