Tubes are in stock in the USA5C3S (5Ц3С) Rectifier New ItemOld stock. The tubes are new and never usedSVETLANA factory"OTK" markedDate Codes from 1950'sVery careful packingLot of 1 Other tubes in stock in the USA (the range and quantity is constantly increasing):US Stock Vacuum Tubes Shipping:Tubes are in stock in the USA, and will be shipped via USPS Ground Advantage ®To all other countries through eBay International Shipping program