The factory codes on these tubes are: AAA3 B3J5 AND AAA3 B4I5
Made by Mullard in Blackburn, England
These are 3 mica gray plate tubes stenciled GT-Britain
40KG6A PL509 Philips Mullard Made Vacuum Tube Pair
- Brand: RCA
- Product Code: Philips Mullard 40KG6A
- Availability: Out Of Stock
-
$39.99 USD
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Tags: 40KG6A, PL509, Vacuum Tubes