RCA HB-3 tube handbook FS

[Ken Simpson, W8EK]

For Sale:

RCA HB-3 tube handbook
This is the "classic" tube manual that lists almost everything.
This particular one includes all four manuals, in the binders.
Binders are in great shape, with nice gold lettering.
Individual pages are also in good shape, with no extraneous
marks that I can find, other than "Reference Section, Xerox Corp."
marked inside the front, plus the associated bar codes.