5R4GY NOS/NIB RCA military spec brown base rectifier vacuum tube used in Collins, Johnson, Viking and Hallicrafters radios. 1955 vintage. AC Delco was the company that low bid the contract and RCA built the tube. The tube has been tested for new performance and is factory fresh. I will properly pack the tube for safe shipment and pay insured USPS postage with tracking number in the US. Same business day shipping.  International shipments through US Postal Service International for actual postage cost and selling price on customs forms. 7 ounces packed weight for international.