Series 3 Unknown brand

Hello all,
I have free wheeling / locking hubs on my 73 series 3 . I can't tell brand , style who the manufacturer was ....zip.
All I know is that their frozen. Not sure whether to replace or repair. Any help would be wonderful.
.

Repair/renovate them ... watch the vid

Should be too hard will be gummed up thru lack of use

Your probably right. The video is a good.tutorial.
I was more concerned about if I need parts or a rebuild kit of some sort.
I've looked around and can't match anything to the picture for company info.
Look a little like AVM but letter on the grip are different.

try ORA https://www.repco.com.au/parts-serv...suits-hzj105-78-79-series-ora-901s/p/A8784119

Thanks Mystery.
Just by chance I did some extensive site searching on site and found another member' post( 12 years ago)with almost the same issue I have. It answered my questions.
Moving forward, tried to loosen the lock/ free hub center cap...it crushed and broke apart. Guess this will change directions to a replace as opposed to repair event.
Thanks for the help