YES- Some that were manufactured in the US, under military contract, were labeled, "USN", "USN-CEP" or had a "JAN" designation. Still the exact same tube. There are three colors of label(white, green, orange) and each has a slightly different presentation. Some Amperex 7308s had a globe logo also. Be certain of your source's honesty, as these are being counterfeited. They should all have a seam in the glass, across the top of the envelope.
