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UCL82=50BM8 NOS (1 in stock)
UCL83 Mullard NOS 1958
UF14
UF41=12AC5 Ultron East Germany NOS (1 in stock)
UF42 Valvo by Mullard 1962 NOS (2 in stock)
UF85=19BY7 Telefunken NOS
UF89=12DA6 Amperex Bugle Boy Italy NOS 1963 (100/60)
UF89=12DA6 Telefunken Germany NOS 1963 (102/60)
UF89=12DA6 Telefunken made by Philip Italy NOS 1969-1970 (107/60)
UL41=45A5 Miniwatt France NOS 1962-1963 (3 in stock)
UL84=45B5 Amperex Holland NOS
UL84=45B5 Mullard UK branded Raytheon NOS 1963
UL84=45B5 RSD East Germany NOS (read history on UL84)
UL84=45B5 Telefunken Diamond Bottom NOS 1960
UM35
UM4 Adzam NOS tuning eye 1950's (5 in stock)
UM80 Valvo Holland tuning eye NOS (2 in stock)
UM84 Valvo used (tuning eye)
USN-5651WA Chatham by Tungsol NOS 1953 (1 in stock)
UX-120 Radiotron used/tests 35% (low Gm=100) (display tube)
