This issue also had an interesting symptom in that if the watch was face down the repeater struck but slowed way down at the end. This was also the repeater mechanism needing oiling. If on its back the repeater struck at three times the speed it should. There should be a steady chime not all within 5 seconds for 12:00. After oiling the pivots of the repeater and the arm pivot of the governor it struck at a good steady rate.
The movement needed to come out of the case for further cleaning. Removing a repeater movement is kind of a jigsaw puzzle. In this case the order is to start with removing the gong screws by the hammers. Then rotate the gong until the block is in line with a hammer. The advantage is that the hammer moves and can give you room to lift that bock out with the gongs.
Next step is to remove the stem and crown. In this case there is a screw that was hidden under the gong. This is a high polish head screw and does not need to come all the way out. Just back it up enough to pull the stem out.
After that was out then the repeater button needs to be removed. Luckily this is only held on by a single long screw. Once you have the screw off the button will come out. Then there is a case half screw that was right under the gong by the governor.
Now the movement comes freely out from the front. Remove the hands and then go about taking the dial off. In this case the dial is a snap on one. There are no feet. There is a pin on the rim to guide you when you are putting it back on. The dials are a rather snug fit.
Once I had the dial off I went about cleaning and oiling the parts and pivots. I wish I had taken a picture of it at this point but I was having way too much fun. The watch portion will be pegged and cleaned when I replace the mainspring as I don't want to have to do it twice.
The assembly is the reverse of the take down. But I learned a valuable lesson. You can't just screw the gong block down and think it will sound fine. It repeated with this dull thunk noise when the hammer struck. I figured out that if you back out the screws a bit and then activate the repeater the hammer will make the gong settle in the right place through the striking force. Tighten the screws as it chimes.
While the watch movement was out I went to work on the case. The inside of the crystal appeared to have a speckling of something. At first I though the crystal had been hit multiple times from the inside causing some small chips. The substance came off nicely though with glass cleaner.
I cleaned the inside of the case with a cape cod cloth and that helped get the shine back to the inside covers. The green gunk, as I like to call it, was mostly removed using a sharpened piece of peg wood. I will be using some Hoppes #9 when I get home to see if I can clean it off the rest of the way. I am leaving the case unpolished because it gives it character.