Help me ID this pickup

[djpharoah]

I just got a new baby in (will post up soon) and it's got a H-S-S setup and the bridge pickup is a duncan that just says "B-M" on the bottom and nothing else.

The bridge pickup has cool midrange but a really sloppy bass with loose low end. I couldn't find anything else online.

[RacerX]

That's the little know Duncan Bowel Movement

[modelseriesman]

Just means for use in either [B]ridge or [M]iddle positions.

The BM. For really loose low ends.