UB Libraries and faculty to restore and study Greek and Roman coins from the eras of Julius Caesar, Alexander the Great and more BUFFALO, N.Y. — Finding a $20 bill could make your day. Find rare, ...

But Alyattes had been making coins out of electrum, a naturally occurring gold-and-silver alloy that often has bits of other metals in it. Alyattes' coins were standardized based on weight ...