Hello. I just bought this badge in Poland. I was told this is from the Estonian 1st Hussar Regiment, but the nut on reverse said it was made in Warsaw, Poland.
Can you help identify this badge? Any information would be appreciated.
This page agrees that it is the badge of the 1st Hussar Regiment of Estonia,
The one shown on the page linked to was made in Estonia, though.
Here is an Estonian Wikipedia page about the regiment which shows an illustration of the badge and if you Google "Ratsarügement" you will find lots more on the regiment and its badge.