I bought this Timex "Q" for $5.00. It runs great and keeps time. The dial, crystal, and bezel look fine, but the back is a different story. Old corrosion caused part of one lug to just crumble away. Half of the hole that holds the spring bar was gone. I remembered many years ago, when I worked in a hardware store, that we sold a product called PC-7. I did a search to see if it is still made. It is and is readily available from several sources. It is a two part epoxy paste that can be shaped and moulded and will not sag or run. It takes about 24 hours to achieve working strength. Once it has set up it can be filed, sawn, sanded, and drilled.
So, I mixed some up and reshaped the bad lug. After the paste had cured, I sanded the lug to shape with my moto-tool and re-drilled the spring bar hole with a very small drill bit. The repair does not look all that great, but it works. It sure is better than tossing a nice old watch. I suppose I could have shaped it a little more and made it look a little nicer, but I figured that the more stock I removed, the weaker the repair would be. I believe a little silver paint would make it even less noticeable, but I am fine with the way it is. PC-7 is great stuff.