Aren't the pad retainer "springs" different between the two brands? If that is the case, my ATE's have springs made from folded flat spring steel and are formed into a cross shaped form. Pulling the wheel on one should allow you to verify if this is indeed an ATE or Bendix application.

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1961 190Db retired
1968 220D/8 325,000
1983 300D 164,150