That was my first thought, but it's not. The dial count and placement is off.
The control plate looks to be silver and it has silver tipped Marshall dials, so I thought maybe it's was a Jubilee variant but again, dial count and placement is off. Not a Granger either.
It is in a Marshall headshell though, and the logo is from a Marshall bass amp.
It's probably a custom made Marshall clone by a local builder they know or found.