There's more written here re. Asch and Disc labels.
http://www.oldtimeherald.org/archive/back_issues/volume-6/6-1/asch-folkways.html

Paul T. Jackson--Trescott Research

On 4/19/2017 3:21 PM, Thomas Stern wrote:
> Folkways started releasing circa 1948-49.
>
>   
>
> The ETHNIC FOLKWAYS LIBRARY 78rpm albums carried an EFL prefix.  Discs were
>
> numbered with EF prefix, matrix numbers 014xx, that I've seen.  Were there
> other
>
> numbering systems ????
>
>   
>
> The regular FOLKWAYS releases INITIALLY catalogued as FOL (78rpm) or FOLL
> (LP) prefix.
>
> I SUSPECT (can anyone provide actual evidence to support this contention)
> that the
>
> FOL/FOLL prefix caused confusion, so the prefix for LP releases was changed
> to FP.
>
>   
>
>    What does FP signify ???   Again, I hypothesize it meant Folkways
> Plastylite.  Also
>
> possibly Folkways Production, or ?????  Any documentation to support or
> refute this ????
>
>   
>
> I have seen 78rpm disc labels which say FOLKWAYS RECORDS, others for same
> album
>
> which say FOLKWAYS RECORDS and Serv. Corp.
>
>    Anyone know which came first ????
>
>   
>
> 78rpm releases:
>
> I would like to compile a list of ACTUAL (i.e. discs exist, not only a
> catalog entry) 78rpm
>
> releases of Folkways albums (NOT the Ethnic Folkways Library, at this time).
>
> If you have these discs, please send details.  THANKS!
>
>   
>
> LP releases - does anyone have LP releases with the FOLL prefix ????
>
> Is it on the Jacket AND Disc label, only on Jacket, or only on disc label
> ???
>
> The early Folkways LP releases I've seen have a small label pasted on the
> jacket,
>
> which sometimes contains the FP number and FOL (78rpm) number.
>
>   
>
>   
>
> Thanks!
>
> Best wishes, Thomas.
>
>   
>
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