Some wierd stuff went on back then before the RJF got standardisation sorted didn't it. Here's a very young boy wearing the sympathiser buckle you guys have and a girl wearing a buckle which, if an example were to be shown here on the forum, would be thought of as a DJ buckle
I have an ASSMAN catalogue which also lists this buckle as BDM
Paul
I am pretty sure that the BDM designation is for the single claw BDM buckle which is under where it says BDM..