Ah Chip, the description say "bi direct", that's why there's no marking that the other guys are talking about.The only markings on it is a logo trademark and a part number like you see in the photo.
I put a Pertronix in my 37 and 51 trucks about a month ago.A lot og guys were jabbering about voltage spikes frying the unit. I don't ,can't hurt to try these gizmos,got 20 of them for chump change,16 volt and 22 volt, 1500 watts.Anyone want one?, I'll mail it to on my stamp, but don't all line up at once.
