"So far, 111 finds have registered with us," a spokesperson from Kultureprojekte GmbH, the organisation in charge of the "Lichtgrenze" (light border) project, said.
More than 7,000 balloons were released in succession on November 9th to mark 25 years since the Berlin Wall fell, signalling the beginning of the end of Germany's division into two countries.
Those who find the balloons are encouraged to register their find with the company. Their finds then get verified and placed on a map.
Inga Eglite-Uldrike did just that when, walking on a beach near the Latvian capital of Riga, she found a balloon.
"In [sic] a sunny day of the 23th [sic] of November, I went to the sea side of Mangalsala with my one-year-old son for a walk and found this greeting from Berlin," she wrote with an accompanying picture.
The distance between Berlin and Riga is 844 kilometres, measured as the crow flies.
Sunday was the last day to register the found balloons.
Most of the balloons have been found in northern Berlin, though three postcards were found in Poland and four made it to the former West Germany.
One lucky finder also netted himself an autograph from German actor Anna Loos when her balloon and postcard was found.