Quote: Wasn't this the type of coin that led to them calling "ships or heads" rather than "heads or tails?"
Correct. The Romans may not have been the first to invent the concept of tossing a coin to make a decision and/or determine the will of the gods, but the coins the Romans used to do the tossing - large bronze asses like this one - had this design for so long, "caput aut navis" (heads or ships) became the Latin call-out on a coin toss, even long after the heads-and-ships design was abandoned.
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