Old weighing scale, photo by Arnold Gamboa
Balance (Weighing) Scale
I just about remember this contraption. This was the scale used before digital came along. It was rather fiddly to use, ergo, some genius scientist had to invent something simpler and easier machine to use. But having said that this old scale at least challenges your motor neurone much more, which can only be a good thing.
To use this scale you need to balance the item inside the measuring plate on the left with the corresponding metal mini bell. A bell could weigh, a pound, 2 pounds, 3 pounds, etc.