Supreme Instruments RCA Letter April 23, 1932
On April 23, 1932 D.N. Dulweber sent the following letter along with a sales flyer to RCA quoting the
discounted cost to RCA of the Supreme AAA-1 Diagnometer.
Later in In 1932 the photo below was published inside the front cover of the book "Radio Servicing Course" by Ghirardi and Freed showing
an RCA radio repair bench equipped with a Supreme AAA-1 Diagnometer.
Supreme later used a "retouched" version of this photo on the cover if their 1933 catalog.
A special thank you to Jim at VacuumTubesInc.com for the providing the original
letter from his files for this collection.
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