"H" is not short for Heraclea - they hadn't yet invented the first-letter-of-the-city-name concept of a mintmark when this coin was made. H is the Greek numeral 8, meaning the eighth officina (minting-house within the city). Exactly which city isn't stated on the coin; we need to rely on archaeological evidence to know the city of origin is Antioch.
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