It's the newer version of the Computerized Color Head... where they got rid of the computer, and with it all the gremlins that crept up as the things aged! It's the same basic head but the dials on the front simply gear-drive the indicators and the filters. There isn't the whole "feedback loop to keep colors consistent even as the bulb ages" thing, but then again you can be pretty sure that when you turn it on it will actually work! About the only thing to go wrong on it is the bulb.
They made the 45s before the computerized color head. Beseler continued to sell both versions for a long time. They since discontinued the computerized version.