Vintage AA IV Year Recovery Medal Token, unique has BSB initials & TM in circle

Description

The medallion was either to where around your neck or for a key chain as it has a hole in the top like many do. The hole is original to the manufacture.
I have not found any info on the BSB initials on the lower right front below the triangle.  Also, this one has a circle in the middle of bottom with TM encircled. TM I assume is Trade Mark.  It was in a box I inherited from my mother.  She did not drink so I do not know where this came from.  From another family member or ??.
I have had it sitting in a box for 30 years.  Hopefully, someone will find this special.