5963 TUBES ARE NEARLY IDENTICAL TO12AU7 and can be used interchangeably. "BECKMAN" SYLVANIA-MADE 5963 TUBES. SEE PHOTOS FOR THESE NUMBERS. MATCHED, WITH MATCHING CODES PRINTED ON EACH TUBE. Tubes have been tested on Triplett 3444 tester and are bothstrong, matching in transconductance.
Beckman Series 300 Multimeter Operator Manual Original manual. Pocket size. There is where on the back cover and the last few pages. Overall clean condition used.
2532 932 Beckman. Black Coated Glass. In Original Box. Black Base.