Wayne:

I have a black navy version of the MF "BCB" receiver with 12V filaments.

I confirm the filament wiring is original - untouched.

I bought this set from a small disposal shop.  As received the set was original, with the exception that the motor-generator and tuning knob and dial were missing.  It's not a BC-455 but it is a 'command' set with 12V wiring.

Leslie