The U-1093 Super-Fuzz is probably Univox's most famous product after the Hi-flier. It had balance and expander knobs, plus a tone button($39.50). Here's a pic of a newer one with a bigger swtich in blue. Also in red green, black and metal
Availibly before 1976, and possibly after. Over the years came in many different colors and cases.
Portions Copyright Michael Wright, author of Guitar Stories Vol. 2, and Vintage
Guitar Magazine; used by permission.