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 Raytheon NOS in CK5651 box (1 in stock)
UX-120 Radiotron used/tests 35% (low Gm=100) (display tube)
UX-199=199 RCA Radiotron NOS 1930 era (1.7ma)
UX-874 Radiotron Balloon tests like new 1930 era
UY-224 RCA Balloon used/good 1930's (37/25) (3.0ma Gm=700)
UY-224 RCA Balloon used/tests like new 1930's rattle inside base (50/25) (4.2ma Gm=1000)
UY-224A RCA Balloon used/very good 1930's (41/25) (2.6ma Gm=900)
UY41=31A3 Amperex Bugle Boy France NOS 1964 (0 in stock)
UY41=31A3 Philips Miniwatt "D" getter halo NOS 1958 (1 in stock)
V2000 Telefunken
VR-150=VT-139=0D3 Sylvania NOS 1940's (argon)
VT-138=1629 RCA NOS 1940's 1/4" tilt bright eye
VT-138=JAN-CRC-1629 RCA NOS 1940's very slight glass tilt
VX-41A Victoreen NOS (4 in stock)
Wavy Washer NOS (30 in stock)