That one's a Fontana, not original. They came with Oldani's. Fontana is a nice brake tho. Hang onto it, worth good money nowadays. Repops of the big ones go for like three grand, last I looked. Probably up to five now.I have a front wheel and brake assembly like that one.
Actually, they give you more feel than a disk and work a little better, until they get hot. On a street bike I'd rather have one ... if I wuz allowed to have a street bike