270R4 ballast used
40A1 Sylvania ballast NOS (6 in stock)
40A1 Sylvania ballast used (4 in stock)
40B2 US Brands Ballast NOS (3 in stock)
K42B Hytron ballast used (sold)
KX-23/R ballast used/good (78 ohms)
W-45788 Crosley ballast used/good 1940's (247 ohms pins 3-7)