Oops ... yeh there were some of those big old ‘70s cases with the Brother Records logo for $500.
The Beach Boys had a company called American Productions that handled their touring and rehearsal equipment, among other things. They were on Lincoln Blvd, somewhere near the Santa Monica/Venice border. I went there in 1979 and purchased a Kustom PA that the band had used - don't know if it was for rehearsal or very small venue gigs - plus mics, and cables. I didn't get a tour of the facility, but I did see lots of rolling Anvil cases with the Brother logo on them.
When I arrived, Dennis was crashed out on the love seat in the reception area.
PS - there were four pieces of masking tape under the mic inputs of the PA head. The names on the tape were, Mike, Al, Carl, Brian.
PPS - Nope. No longer have that equipment.