"Most of the disc lathes at radio stations didn't have chip-blow apparatus, so plenty you will find from those days were cut starting from the inside (at the label) and the stylus went to the outside. This let the cutting stylus just carry the chip to the outside of the disc and it didn't run over it. Those discs are marked "Start Inside"."

"Mag tape wasn't commercially-viable here in the USA until roughly 1948. Before that was wire-recording. Most everything in those days was cut directly to disk. "Ortho" refers to the EQ curve you use on playback, as opposed to "RIAA". "Start Ouside" means you start playing the disk from the outside and the stylus is carried toward the label."

"This was the pre-stereo days. You have to play these with a mono "microgroove" stylus, or you will ruin them."

"Dear heavens.... this instrument is darn near destroyed!"

"yeppieeeeeeee....all mine nw after dat ruthless auction"