(!) (BEST PAIR) 5727=2D21 RCA NOS 1958 (1 pair)
2D21 United Russian NOS (4 in stock)
2D21 US Brands NOS (11 in stock)
5727=2D21W Amperex by GE NOS 1979 (4 in stock)
AX2D21=2D21 Amperex Holland 1958 (1 in stock)
GB-5727=2D21 Sylvania "Gold Brand with Gold Pins" NOS (4 in stock)
