[Slowhand] Eric Clapton unknown vinyl

[J Ga]

My girlfriend came home today with an Eric Clapton vinyl she picked up at a 
garage sale and upon further investigation it seems different than all the 
other vinyls I have.

The whole cover is white except for the black text which says 'Eric 
"Slowhand" Clapton On White' and lists the following songs: Cocaine, The 
Core, Lay Down Sally, and Wonderful Tonight. At the top it says:

PRO 035
FOR PROGRAMMING ONLY
NOT FOR SALE
33-1/3 RPM STEREO

I was just curious if anyone knew the value of such an item and how it came 
into existence, what it was used for, etc. Thanks a bunch.

-Jordan G

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