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5440 Burroughs Nixie tube used (16 pins) (0 in stock)
5441A Burroughs Nixie tube used 1969 (16 pins) (sold out)
5448 Burroughs Nixie readout tube used (16 pins) (1 in stock)
547DX Raytheon NOS (3 in stock)
55 Philco 1940's tests like new (52/24)
55 Philco used/good 1940's (52/24)
55 US Brands NOS (0 in stock)
551 Arcturus Blue Balloon used/very good 1930's (43/26)
5516 CBS NOS (0 in stock)
5517 Raytheon NOS 1950 (single)
5541=6R8 Delco Radio NOS (4 in stock)
5558 GE NOS
5581 RCA Photocell for sound NOS 1959 (single)
5583 US Brands NOS (7 in stock)
56 GE used/good 1940's (4.2ma)
56 Made in Holland NOS 1940's (5.1ma)
56 National Union engraved base used/tests like new 1930's (6.0ma)
56 National Union used/good 1940's (5.3ma)
56 National Union used/good 1940's (5.9ma)
56 National Union used/good 1950 small faded getter (4.1ma)
