Picked this up at a muddy March flea market for two dollars. It has numbered notches and a rotating top plate, but no obvious way to attach it to anything. What is this thing?

helping to improve efficiency and yields long before the advent of modern technology.

Each notch on the seed dial corresponded to a specific setting, often marked by a number or symbol. These notches were carefully calibrated to match common seed sizes and planting requirements.

Understanding the notches required familiarity with the specific dial’s design, as manufacturers often had their own systems. However, a common approach was to use larger numbers for larger seeds or greater planting depths, providing a logical and intuitive