Manhole covers are not often seen as collectibles, especially due to their weight – 150 to 250 pounds. Most manhole covers in the United States were made of cast iron leaving them inexpensive to manufacture; sturdy enough to hold up to constant traffic and heavy enough to deter most, but not all, thieves from absconding with them to sell for scrap.
The earliest manhole covers were stone slabs or pieces of wood that afforded entry to enclosed ditches that transported sewage. This rudimentary model was utilized beginning from 3500 BC up to as
