A Mast-Schweineregister (or Schweineregister) is a historical administrative record used to track peasant livestock or a modern digital registry for tracking farmed pigs. (1) (2)
Historical Context
Forest Pasture (Mast): Historically, Mast referred to the right or practice of turning domestic pigs loose into communal forests (especially oak or beech woods) to feed on fallen acorns and beechnuts.
Tax and Tally Records: A Schweineregister was an official ledger maintained by local manors, counts, or administrative districts (such as 16th- and 17th-century German land registries) to document who owned how many pigs, assess grazing fees (Mastgeld), and track regional meat and livestock resources.
The term “mast” comes from Old English mǣst, referring to the forest food that once sustained pigs. Mast years are where trees synchronise seed or fruit production, alternating between years of scarcity and years of abundance.
[1] https://www.dreisbach-dresbach.org/father-abraham-of-balde
[2] http://freepages.rootsweb.com/~dreisbachfamily/genealogy/wittgenstein.htm
An example can be found here: https://www.arcinsys.niedersachsen.de/arcinsys/detailAction.action?detailid=v4948844