50C5 NOS/NIB RCA beam power pentode tube used in hundreds of AA5 radios that use miniature tubes. 1979 production date. Buy both tubes and get a date matched pair. 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 eBay Global Shipping for actual postage cost and selling price on customs forms. 7 ounces packed weight for international.