[78-L] Film of Ann Stephens recording for HMV in 1945

[Harold Aherne]

Here's a film of 13-year-old Ann Stephens in the HMV studios in 1945, making records for children:
http://www.britishpathe.com/video/alice-makes-a-record
Clicking "View as Stills" will display images from various points in the film, including a close-up of the recording blank. Do the esteemed members of 78-L think it looks more like wax or lacquer (or the compromise between the two, flowed wax)? The thickness suggest a cast wax blank, but the images aren't clear enough to be sure where the blank ends and the turntable/other apparatus begins.

Also of interest is a German film from 1949 that shows a tape master being transferred to wax for plating:
http://www.youtube.com/watch?v=wdsMb1pwJEw