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Here we have a 1975 Dynabeat that cones from the Electric series Timex produced. I'll start with the basic case tear down and preparation of cleaning. Remove bezel ring, crown\stem, and crystal. Next pull hands and remove dial. Notice that these dials have tabs so care must be take not to over bend them. For this I used a modified 45 degree Xacto blade which I'v added a notch to on the tip. Place the edge of the blade at angle to tab and back the tab with you finger. Lift slowly and move to next tab. Notice that one tab is very close to the balance wheel. This is where I use the notched tip. Continue to remove the components under the dial. Be careful with the date wheel detent spring as it very thin and bends easily. Now comes the step that many will find interesting or get a laugh over. But, I tell you it works more times than not. The idea behind this is to clean oxidation off the contact wire that bushes against the staff. It also helps remove dried oil and other debris out of the movement. I use a very high tech tool next to blow air to help dry the cleaner up. "Okay so its just a cheap balloon pump". Next another tool I made up that is most helpful. After dotting any pivots both top and bottom, I dab some oil to the train gears just next to the battery compartment. Refit the stem, press down on a fresh battery and give the balance a flick. Sometimes it takes a few but this one went off with just one. clean and buff the outer parts, freshen up the hands, put it all back together. There are some steps I left out and will add in future posting. So what was the first thing that failed? If you said the sweep fell off you would be right. Why it fell off is because I forgot to tamp down the hole to be sure it fit tight again. its has since been corrected and the watch is humming nicely. Thanks for looking.