B&B in my mind would mostly lend itself to a business.
I have identified B&B - B&H - B&K, I have no home game chips with B&B. I am not talking about the BB, I am thinking of the &.
Your chips are not really old enough to be from the illegals of pre 1960.
Could be a later illegal or could belong to Bush and Bush as in George. <g>
Probably no way to ever tell.