It was the DUI brand. I can tell you this, one of the pins the centrifugal advance weights pivot on broke about 2 years after I installed the DUI unit. They sent me a brand new distributor at no charge, so the customer service/support from them is excellent.
I'm not sure but I wouldn't be surprised if the Man-a-fre version is made by DUI and just re-branded.
Randy Rosetta KDØKWX TLCA #19351 69 FJ40 "Meanie" & 1970 Boss 302 Mustang