If it measures up with the coprocessor slot on the motherboard or expansion board it will.

Thing is this: it is rated to run at 33MHz, but the color classic runs at, what(?), 16MHz? So the coprocessor will run at the same speed of the processor, it is is determined by the clock circuit on the motherboard. Nothing wrong with that. Just do not expect it to run at 33MHz because it says so on the chip because it wont because of the main processor and motherboard clock speed.