HeathKit Code Practice Oscillator, Rare & Working

Description

Here is a rare HeathKit code practice oscillator, Model CO-1. This item was sold by Heathkit from 1956 t0 1961. It was one of the first items from HeathKit to use a transistor in the circuit. I have refurbrished it and it works great. The manual says it produces a 1000 HZ tone - I am sure if you looked at it on a scope it would look like a square wave. It has a switch that will allow you to switch from producing a tone to lighting a bulb. Heathkit produced many different types of code practice oscillator, but this was the first.  This item would be great for an HeathKit collector.   International bidders are welcomed.
Please see my other items. Thanks for looking.