pre-WW2 Scarce Polish Eagle Cap Badge wz.19

Polish eagle cap badge depicting an eagle with spread wings sitting on an amazon shield. The head is topped with a closed crown. On the reverse a threaded post with spinner.  

Eagle cap badge used by the Polish Army in the years 1919-1939. Good condition. A scarce example attributed to be made by Bronisław Grabski in Łódź and used in the Polish – Bolshevik war of 1919-1921.