This is a Czechian pin. “Dubena” means April. Beneath that iy says:”Production Coorperative”. It is yet unclear what they produced but it very well could be woodcutting.. On the bottom it says:”Cesky Dub”
Cesky Dub is a small Czechian village with 2773 inhabitants. It was until 1945 a place with a predominantly German speaking population. After the Second World War, the German-speaking population was expelled.