Darryl Donohue

Hi club members, my name is Darryl I’ve only recently purchased a lovely old Buick have joined club to see if I can find out information on my vehicle. The engine number starts with B. Can anyone tell me what it stands for the vehicle was built in America and put together by General Motors Holden in Australia in 1923. I’m trying to find information on the vehicle. Regards Darryl