I purchased this Centco reverb unit off eBayThe only info the seller was able to give me was that it was one of three or four produced as a prototype. It appears to me to be a copy of a mid-60's Fender unit. Compare the Centco control panel with a 64/65 Fender control panel. I'm wondering if anyone has any info on the Centco Electric Instruments Amplifier Co., as it would seem to me from the name that they must have produced other products than this reverb unit. Other than the name, there is no indication of its origin. The two remaining pots say Lesa, made in Italy; there appears to be a Tantalum capacitor and a pin-up capacitor between these two pots; there are two large capacitors that read Fox Electronics, 20X2, 450, with a date code of 3 02 65, so this thing is for sure around 40 years old. If anyone could offer any information on this company or how to find out about it I would be greatly appreciative.