Loco

Loco Amplifiers and LocoBox Effects were Aria brand names. The pedals were handmade (from the late 1970s onwards) by a small team in Urawa, in Saitama, Japan who sold their pedals to Aria,  Although the main brand name was Locobox, they also produced identical pedals under different brand names including: Electra, Volz, Nadines, Cutec, Pearl, Gig, Powervoice, Studio Series and even a few Yamaha pedals.The company was then aquired by Aria who started producing Loco amplifiers as well.

Source: Loco and LocoBox catalogs 1981.

Source: Jaimie Muehlhausen's Unofficial LocoBox website (archived 2006)