Introduction – The cast iron plumb bob with string, also known as the vertical level antique plumb bob, is a tool that has been used for centuries. It holds a significant place in the history of construction and surveying. This simple yet effective device has played a crucial role in building some of the world’s most iconic structures.
Historical Background – The plumb bob’s origins trace back to ancient Egypt and Mesopotamia, where builders and surveyors used stone and bronze versions to ensure vertical accuracy in their constructions. The use of cast iron became prevalent in the 19th century, offering greater durability and precision.