In May of 2021 I couldn't believe I was actually seeing an online auction for this pedal; one that I have been endlessly searching for, for just about 20 YEARS... This is the BM 104 Fuzz-Feedback, it is awesome, and it is finally mine.
Long thought to be made by the other (and way more) famous B&M / Barnes and Mullins, it had otherwise been a bit of mystery as only a single photo of it existed on FXDB and no info. But now that I have it I'm not so sure who made it, what country it was made in, if the circuit is a modified version of something else, or exactly when it was made. So I have a bit of digging to do before I can write a full article.
But, I can say with a high amount of confidence that it does predate the BOSS DF-2 Super Feedbacker & Distortion by at least 5 years, and maybe more. It also functions a bit different than the BOSS, and sounds wayyyyyy better! Probably my favorite aspect of this is that the feedback is set to be triggered by that red momentary switch, so as long as you hold it down, you get feedback in the signal. But what makes this truly unique and special is that the feedback seems to not only stay in tune, but also starts off as a quiet oscillation and then builds in volume and intensity as you hold down the switch. Amazingly it somehow never gets too abrasive and stays musical even at its loudest!
So if any of you have additional info on the BM 104 Fuzz - Feedback please let me know! And if you happen to own one yourself, definitely reach out as I would love to compare the two and see if we can find any clues to its origin.