[78-L] Curious find of Berliner's Lords Prayer

[RUSSELL BARNES]

Hello all,
 
Last week found (in a furniture restorer's workshop) in Wiltshire, UK a couple of boxes of 78s.
 
Most are in clean condition but somewhat warped.   Odd things :-
 
A 12" single sided - white label - pressing of Emile Berliner's " Lord's Prayer "  presumably from the 5" disc.   So a twelve inch dia pressing, with about an inch or so of the recording, followed by a long spiral run out to the label.   Typed label  - "The voice of the Inventor of the Gramophone" - and alongside but written in ink the date 1948.
 
In the run-off are the letters ( hardy visible ) BBC and a number 12RH51705.  Strange as it may seem I think it's pressed in shellac - but it just could be vinyl.   Anyone heard of it ?
 
Others in the finds - 12" Red Label DECCA of an "Air Battle over the English Channel " during WWII.
 
Bernard Shaw on Linguaphone.      
Gas Shells Bombardment during WWI 
Leo Tolstoy on HMV Historic
 
Any information much appreciated,
 
Russ Barnes
Dorset, UK