GE also made a less featureful model that was numbered 7-4870 they dubbed the "Computeradio". They're a little bit cheaper but I would imagine they'd use a similar design.
I always wondered exactly what they meant by "programmable" clock radio, I guess it refers to programming your favorite radio stations into the memory.
I was thinking about why I liked the 7-4880 so much and I'd have to say is because the "UI" was so logical and well designed. The display had modes for alarm 1, alarm 2, time, radio and sleep, but you could set the fm station from any mode by pressing fm, typing 981 and enter (to set 98.1 for example). You had a "C" button to clear off any entry, up and down buttons for tuning the station, and an OFF button well separated from the main keypad. Also the buttons were in two different colors to help you identify them.
The design was absolutely brilliant. I'd have kept mine if the buttons hadn't stopped working. I never thought in a million years that it would have an actual CPU inside that you could dump. 8-)
I pulled the 14 segment displays and ULN2804's off the boards for re-use and the balance is long gone. All electronics had a habit of selling weird stuff like that; I bought three brand new super a'cans from them for $4.99 each in the late 90's.
As for the "radio shack sound effects chassis", I had been looking for that for a long time. I couldn't find the RS part number, since it was only advertised in a monthly flier, and never in the catalog proper. I did a bunch of ebay searches, but never found it because I didn't remember them calling it a "sound effects chassis". I had bought one when I was 10 or so, and had fun playing around with it, and then one day it quit working. I highly suspect it quit working because I ran it on 9V. The paperwork that came with it said to run it at 9V, which I did, and the PIC (which is a 5V part) got quite hot. I didn't know until after I dumped the ROM from it that it was an actual released electronic game.