Obverse lettering: CATHR II D G RUSS IMP
“Catherine II by the Grace of God Empress of Russia”
Reverse: DAS GLI(C)K LACHET - DER ANKER WACHET
Yours did have a loop at the top, now broken off.
A slightly better condition example >
https://americanhistory.si.edu/collections/object/nmah_970265