[AJD] BR/BO AR/AO differences, is it really this easy?

[Chris C]

I have had quite a few discussions on telling an AR
from an AO and a BR from a BO,  is it really as simple
as one has steering brakes and the other does not?  If
this is the case that I guess the new B is a BO.   I
have looked at 5 AR/AO's and 2 BO's and so far it
holds true.  Is this a myth or fact?  BO/AO's have
turning brakes  AR/BR's do not?

           Chris

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