(!!!) (Best Pair) 99=X99 Ken Rad NOS 1940's (2.5ma and 2.6ma)
(!!!) (Recommended Single) C-299=UV-99 Cunningham NOS 1920's (2.3ma) (highest Ma) (UV have small pins) (strong Gm)
(!!!) (Recommended Single) C-299=UV-99 Cunningham NOS 1920's with tube data sheet (2.4ma) (highest Ma) (UV have small pins) (strong Gm)
(!!!) (Recommended Single) C-299=UV-99 Cunningham NOS 1920's with tube data sheet (2.6ma) (highest Ma) (UV have small pins) (strong Gm)
(!!!) 211D=VT-4-B Western Electric nickel base used/60% mid-1920's - reboxed (61.5ma)
(!!!) 231=31 US Made Balloon NOS 1920's (14.2ma)
(!!!) 31 RCA Radiotron Balloon NOS 1920's (13.2ma)
(!!) (Best Single) 201A=UV-201-A Supertron Hoboken New Jersey NOS 1920's (3.8ma)
(!!) (Best Single) CX-220=20 Cunningham NOS 1920's (5.6ma)
(!) (Best Single) UV-201-A Radiotron tests like new 1920's some scrapes on base (3.8ma)
(Display tube) 201A Volutron brass base - does not work - in good condition - 1920's
(DISPLAY TUBE) 216A Western Electric used 1920's
(DISPLAY TUBE) UV-201-A Radiotron "brass base and tipped" 1920's (does not work - display tube)
01A Sylvania engraved used 1930's (2.5ma Gm=400)
01A Wards by Sylvania used/good 1940's (2.6ma Gm=700)
101D Western Electric Tennis Ball 1920's test like new (7.8ma and 8.4ma) (sold out)
102F WE Tennis Ball display tube - does not work
CX-220=20 Cunningham NOS 1920's (triode)
Deforest Audion Isolantite base display tube (single)