Does anyone know what this is?
I believe it is an old bean/pea/or grain sorter.
While much like a soil sifter in nature, because it has a single handle I'm going to guess it is a strainer used to lift fruit/vegetables out of a larger cooking vessel. Items intended for home use were frequently canned at events where several households got together and prepared large batches to conserve time, human energy, and fuel.
PS--With my luck, it will turn out to be a pebble counter.--cgc--
Or get the bones out of the chicken soup?
Crackling remover in lard cooking boiler shelter tool.