[78-L] Columbia 1950s demo

[Steven C. Barr]

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From: "Han Enderman" <jcenderman at solcon.nl>
> Ebay # 370272615438 shows a Columbia "360" demonstration record, with 5 
> tracks from LPs, listed as 10" 78.
> Numbered 41662, it is a very high nr for the 1950s 78rpm series.
> Last Canadian Co known to me is 41476.
>
> What is "360" (early surround?) ?
> Why a 78 to demonstrate LP issues? Or is this a 10" demo LP as suggested 
> by the LP logo?
> But I have never seen 10" Columbia LPs without prefix, and thus, what 
> numerical series is this?
> So what is this?
>
I own a 10" vinyl disc recorded at 78 rpm. It seems to be part of a 2-record
set, demonstrating "stereo" vs. "quadraphonic"...the disc I own has mono
on one side and stereo on the other, giving me an actual stereo 78! The
record I am missing might(?) be a "quadrophonic" 78...?!

The idea seems to have been that 78 rpm recordings offered better
fidelity than did 45/33 rpm recordings?!

Steven C. Barr