Film footage of Model 75's being manufactured

I'm still buzzing after finding this today... the footage is only a few seconds long, and starts at 2:13 roughly... it looks to me like model 75's being assembled (prior to the dial assemblies being fitted).  I've never before seen, or heard of, any film footage of the factory, and only stumbled across this while looking for information on munitions manufacturing in radio factories...

I realise I am probably the only person who is incredibly excited about this... but I wanted to share it anyway 

www.nzonscreen.com/title/new-zealand-munitions-1941

Now I'm gutted I can't add a movie clip to the book 

Cheers, Steve