The Manlay Sound Octavi is a clone of the Octavia, the octave up fuzz made famous by Jimi Hendrix.
While different units Jimi used may have had multiple names, one of the several built by Roger Mayer around 1969 was reverse-engineered by Tychobrahe in the early 70s and sold as Octavia. Dunlop reissued it as Octavio, and it's possible that