Monday, July 10, 2023
Riga, Latvia
From the Latvian capital city Riga. On the left is a stamp from 2017 commemorating the launch of the first Latvian nano-satellite, Venta-1. And on the right is a 2018 stamp from the annual series "Unique Exhibits of the Latvian Museum of Natural History". This stamp features the mineral Gypsum.
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