I have an Omega Concept Six enlarger which I'm pretty sure is the same thing as a C700, only with a built-in paper safe. It's a 6x6 condenser enlarger.
I can buy a Omega Chromega B dichroic head, but I'm not sure if this head will fit my enlarger.
I've got a Chromega-B which is a 6x6 and I've used c700 negative carriers with it.
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Would you like me to check anything on it? You should probably try to get the power supply/stabilizer with the head if possible. The stock lamp uses an odd voltage and requires it, but I've read you can change out the lamp to 120v if needed.