Of the three, this clip looks most likely to be her:
She was launched in 1926 and the clip is dated 1925 which puts a bit of a question mark over it.
Now, Neil, the previous owner (key advisor and originator of the Beta III dream) has suggested that he will be able to work out if it is her…. so over to you Neil…. Let me know your verdict.
The other two related clips are below: