[78-L] Columbia 1950s demo

[Robert M. Bratcher Jr.]

At 10:04 AM 6/6/2010, you wrote:
>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?
>
>Han Enderman

I'll bet it's a 10" demo LP that plays at 33 rpm.....