How did they title cars back then? et.al.

[dave in australia]

John, I believe your correct. The centre cross member is stamped to support the foot brake cross shaft of the first two brake systems on a RHD car. Those stampings are not present on the third style brake system. Has your chassis got a hand brake mount on the right hand chassis rail just forward of the centre cross member. If it has, it is a chassis for the first brake system, if there isn't, then it is for the second brake system. Both were easily converted to the third system, which is what you now have fitted.