Vintage Sony B&W TV Battery Power Supply Japan BCP-1??

Description

Up for sale is Sony B&W TV Battery Power Supply Japan.  I could find no identifying marks on it, but it appears to be an earlier version of the Sony BCP-2.  Could this be a BCP or BCP-1?  .  Comes with leather case.  Includes the two lead acid type batteries that are far gone.   Please ask any questions before purchasing.