Repairs of the Last Word 711 indicator can be surprisingly tricky because new parts don't always fit as well as they should. You should be prepared to make minor alterations from time to time.
To do a satisfactory repair you'll need a pair of fine point tweezers, a small and a large screw driver, small jeweler's pliers, hand lifter, a loupe (or magnifying glass), de-magnetizer, cleaning solution (your choice), and lubricating oil.
Begin by completely disassembling the indicator. This is the only way you can examine each part and determine what needs replacing.
Remove the large cover screw on the side of the body. Remove the large cover screw on the end of the body (or the holder which may have been placed there). Remove the contact point (see instructions above) and unscrew the pivot screw. The lever assembly now slides out of the body. Remove the bezel (see instructions above) and the clear plastic crystal. Now you'll have to get the hand off and for this you'll want to use a hand lifter. You can improvise using two flat bladed screw drivers, but beware, you're likely to break the pinion if you're not careful. Remove the two screws which are revealed under the dial. Lift off the plate, the wavy washer and the ring. You're left looking at the hair spring attached to the spiral gear (center pinion). Notice that the hair spring is pegged into the body with a small brass pin. Push this pin out from the inside of the body. It can be tricky. When complete, remove the spiral gear, but there's no need to separate it from the hair spring. Leave these intact. Congratulations! Your disassembly is complete.
Clean all the parts by soaking them in a cleaning solution of your choice and then brushing them clean with a soft brush. Take extra care not to harm the hair spring. We like to use the mildest solution that will work, starting with an organic cleaner and moving up to a petroleum product if the grease and oils won't dissolve. It's imperative that all parts are immaculately clean and dry. If rust is present, now is the time to take out the wire brush and sandpaper.
As you reassemble in reverse order, you'll want to examine each part for damage and replace those with new parts. There's little chance that any part can be repaired, so you'll save time and effort by keeping a small stock of commonly used parts at hand. Use a tiny amount of oil on moving parts and don't forget to demagnetize these indicators when done.
A fine-tip oiler can make applying small droplets of oil easy. It can make all the difference.
Bergeon Swiss Made Black Extra Fine Tip Oiler
On page 73 you'll find a parts breakdown to make identification easier.
There's quite a bit of satisfaction to be had upon the successful repair of one of these indicators, so enjoy!