Mowing and peening of a scythe. Peening a scythe is a 'thin' beating of the blade with a hammer, so that it becomes sharp for use.
Practitioners and those involved are the older generation of farmers. See also www.achterhoekse-evenementen.nl/zeis
Started in Neoliticum, from hunter to farmer. Flint-stained deer horn to iron sickle, from sickle via zigt to scythe.