CBM B Series: 6509 @ 2MHz, 6545/6845 Video, 6526 CIA, 6581 SID, BASIC 4.0+
(Sometimes called BASIC 4.5)
Commodore differentiated between the HP (High Profile) and
LP (Low Profile) series by naming all HP machine CBM. (B128-80HP was CBM128-80).  Also, any machine with optional 8088 CPU card had 'X' after B or CBM (BX128-80).
CBM B128-80HP 128kB, Detached Keyboard, Cream.
CBM B128-80LP 128kB, One-Piece, Cream, New Keyboard.
CBM B256-80HP 256kB, Detached Keyboard, Cream.
CBM B256-80LP 256kB, One-Piece, Cream.
CBM B128-40 6567, 6581, 6509, 6551, 128kB.  In B128-80LP case.
CBM B256-40 6567, 6581, 6509, 6551, 256kB.  In B128-80LP case.
CBM B500 128kB.
CBM B500 256kB. board same as B128-80.