Syndicalist Bulgaria

Flag of Syndicalist Bulgaria (Socialist Republic of Bulgaria), from Kaiserreich. In essence it is Communist Bulgaria's flag with an enlarged and centered Coat of Arms.

Original Flag (by redrich1917):
http://redrich1917.deviantart.com/art/Flag-of-the-Socialist-Republic-of-Bulgaria-414950868

Kingdom of Bulgaria

Flag of the Kingdom of Bulgaria, sometimes called the Third Bulgarian Empire or the Tsardom of Bulgaria. 

Original Flag:

https://upload.wikimedia.org/wikipedia/commons/thumb/9/9a/Flag_of_Bulgaria.svg/800px-Flag_of_Bulgaria.svg.png