From Stamps of the World
Gostyń is a town (20,746 inhabitants in 2004) in Greater Poland Voivodeship, in Gostyń County. It was in the Kreis of Lissa (Leszno) when in Prussian Posen province (before 1870); from 1975 to 1998 in Leszno Voivodship.
Postmarks in Empire of Germany Posen province
Postmarks in Prussia Posen province
It used the code 519.