A collection of new stamps of Tsarist Russia and the Soviet Union 1889-1937 100% original. Quality: brand new, unused, with factory glue. I-The 1936 stamp, catalog number 543СWUo, is very rare and a factory defect. According to the catalog, this stamp is without perforation only on the top and is worth 100-160 euros. In this case, it is also without perforation on the left side, which is not listed in the catalog. Such factory defects increase prices several dozen times. The total price of the lot includes only the catalog price (excluding the price of the defect). II-The 1937 stamp, catalog number 682IIA, also has a very rare factory defect. The pilot's image is unevenly shifted to the right and rotated. The distance between the image and the perforations is uneven (marked with red arrows in the image). Furthermore, one perforation is missing at the bottom left. Such factory defects increase prices several dozen times. The total price of the lot only includes the catalog price of 60 euros (not including the price of the defect). Prices are taken from the 2021 Michelle catalog in * quality. Prices are much higher in ** quality (new). Michel 2021 CV-1405evro(If we take into account manufacturing defects and new condition stamps, the price of the lot can reach from 3000 to 4000 euros.) Parcel will be carefully packaged and shipped by registered mail with insurance and tracking code.(I do not combine shipping) England buyers need to pay extra money for customs in your own country